On April 23, voting began in West Bengal, one of India’s most geopolitically significant states. Voters will choose members of the state’s legislative assembly and thereby the next chief minister. Voting is being held in two phases on April 23 and 29, with results expected on May 4.

The political environment is influenced by security and migrant issues, identity politics, and an increase in political polarization. Over 8,000 polling booths were declared to be “super sensitive,” with a massive presence of security personnel to avert violence and intimidation.

The heavy focus on “illegal migrants,” including the controversial Special Intensive Revision of the electoral rolls, which removed over 9 million people, or around 19 percent of registered voters, gives the election a deeper significance for Bangladesh. The West Bengal vote is being shaped by the same borderland anxieties over migration, documentation, and belonging that have defined politics in eastern India for years.

West Bengal accounts for over half of the Bangladesh-India land border, making it the most important interface between the two countries. Trade routes, migration patterns, and similar political narratives all pass through this geography. People from both sides of the border share the same language, too. 

Kolkata does not decide India’s foreign policy, but it shapes how that policy works on the ground. Policing, rhetoric, border management, and even water negotiations are all influenced by the political environment in West Bengal. That is why this Indian state election matters in Dhaka. 

West Bengal’s Election: Setting the Scene

In order to understand the ongoing election, one should refer to the political history of West Bengal. For over three decades, the state was dominated by the Left Front, led by the Communist Party of India (Marxist). That ended in 2011, when Mamata Banerjee and her All India Trinamool Congress (TMC) assumed power due to a wave of anti-incumbency tide and successful grassroots mobilization.

Banerjee has dominated state politics ever since. She is one of the most powerful regional leaders in India and has won three assembly elections in a row. Her party also increased its organizational strength by securing 29 out of the 42 parliamentary seats in the state in the 2024 national elections.

At the same time, the Bharatiya Janata Party (BJP), which rules India’s Union government, has emerged as the main challenger. Over the past decade, it has expanded significantly in West Bengal, turning the state into one of its key battlegrounds. The BJP’s rise has reshaped the political landscape, replacing the Left and Congress as the principal opposition. As a result, religious and extreme Hindu nationalist politics have spread in West Bengal. 

The broader trend is clear. The state has moved from one-party dominance to a highly polarized contest between two strong forces. That polarization has also brought national issues into local politics, especially those linked to identity, migration, and security.

Banerjee is seeking a fourth term in office, which would make her rule nearly two decades long. Her party won the last assembly election in 2021 by a big majority – 213 seats out of 294 – while the BJP won 77 seats and solidly positioned itself as the main opposition in the assembly.

By contrast, in 2016, the TMC won 211 seats, and the BJP was left with only three seats.

These numbers highlight how quickly the political landscape has shifted. Within a decade, the BJP has moved from the margins to a strong challenger. Now, it is treating the 2026 election as a serious bid for power, backed by national leadership and organizational expansion.

“The BJP’s juggernaut has expanded through North, Central and Western India,” Sabyasachi Basu Ray Chaudhury, a political scientist professor at Rabindra Bharati University in Kolkata. “It has been contained so far in the south, thanks to DMK, Congress and Left. In the east Mamata has been able to contain it so far.” 

Campaign narratives reflect the high-stakes campaign. The BJP has focused heavily on law and order, border security, and what it describes as “infiltration” from Bangladesh. It has also raised broader issues such as the Uniform Civil Code and national identity.

The TMC, on the other hand, has framed the election around welfare delivery, social inclusion, and the protection of Bengal’s autonomy. It has positioned itself as a defender of secular politics against what it describes as divisive rhetoric.

Early signals suggest a competitive race. Anti-incumbency may play a role, but not necessarily enough to decisively unseat the ruling party. 

“Given everything, the TMC still has an edge over the BJP, as the BJP continues to lack booth-level organizational depth, which remains crucial in West Bengal’s electoral politics, while factors such as the SIR issue and the Bengali–non-Bengali divide are also shaping voter behavior,” said Chaudhury.

At the same time, the BJP’s growing presence ensures that the contest is no longer one-sided.

“The politics of migrants, infiltrators and religion is not new in India or West Bengal, but the intensity has certainly increased,” said Dr. Sk. Tawfique M. Haque, chair of the Department of Political Science and Sociology and director of the Center of Peace Studies and the South Asian Institute of Policy and Governance at North South University.

That intensity reflects a broader trend in Indian politics, where identity, migration, and border narratives are increasingly shaping electoral competition in key states like West Bengal.

Beyond identity and border politics, the BJP is also trying to turn the election into a verdict on West Bengal’s economic direction. In its campaign, the party has pointed to weak industrial growth and job creation under the TMC, promising measures such as a 3,000-rupee monthly allowance for every woman and unemployed youth, and large infrastructure projects, including new ports and industrial hubs. These promises are meant to position the BJP as an alternative focused on investment and employment.

Recent data shows West Bengal’s unemployment rate was around 3.6 percent in late 2025, lower than the national average of about 4.8 percent. Even so, economic concerns are visible on the ground. Reports indicate that migration for work, lack of stable jobs, and dependence on welfare schemes are shaping voter sentiment in several districts. 

This makes the economy one of the central contested issues in the election.

What This Election Means for Bangladesh

For Bangladesh, the actual effects of the election will not be felt immediately, but it will influence the politics of the border, migration discourse, trade relations, and even water-sharing negotiations over the coming months.

This is particularly vital since Bangladesh itself has experienced significant political changes in the last two years. In August 2024, long-time ruler Sheikh Hasina was ousted following a mass uprising and an interim government was formed under Nobel Laureate Muhammad Yunus, who proceeded to lead the country through a troubled transition. This culminated with the 2026 February parliamentary election, which saw the Bangladesh Nationalist Party win in a landslide, and come back to power after almost 20 years, bringing an elected government back to Dhaka.

The vote in West Bengal is being held just as Bangladesh and India are attempting to normalize their relationship after a troublesome tenure. Hasina’s ouster soured the relationship with New Delhi, which had viewed her as a close ally. The months that followed were characterized by a suspension of visa services, security issues, and trade restrictions. 

Nonetheless, now there are some signs of a thaw at the center-to-center level. Both sides are now increasing their engagement, indicating that they are trying to forget the tensions of the immediate post-uprising situation.

The West Bengal election’s most immediate impact will be on border security and migration narratives. The BJP has made what it calls “infiltration” a central theme of its electoral mandate, linking it to national security and identity. 

Senior leaders, including Union Home Minister Amit Shah, have repeatedly pushed a policy of “detect, delete and deport” to deal with undocumented migrants, alongside promises of stricter border enforcement. Shah has also alleged that illegal migration from neighboring Bangladesh is changing the demographic profile in West Bengal.

Critics, however, accuse Indian security forces of forcing Indian citizens – mostly, although not all, Bengali-speaking Muslims – over the border into Bangladesh with no consultation or verification of their status.

Political developments in Bangladesh are also shaping how the issue is framed in West Bengal. The rise of Jamaat-e-Islami as the leader of the opposition in the recent election has been used in campaign narratives by leaders of the BJP, especially in border areas. These references link Bangladesh to security concerns.

This has raised worries in Bangladesh about the potential for tougher measures following the election, including more “pushbacks” and heightened political pressure.

“The BJP has long used migration- and religion-related issues but the narrative has become sharper now,” said Haque of North South University. 

“It matters, especially if the same political alignment exists at both the central and state levels in India,” he added. “If the BJP comes to power in West Bengal, there could be greater coordination, which could increase pressure, including in the form of pushbacks to Bangladesh.”

“The election is likely to raise the temperature to some degree,” Thomas Kean, a senior consultant on Myanmar and Bangladesh at the International Crisis Group, told The Diplomat. “A BJP-led government in West Bengal will likely increase the securitization of the border and could put increased strain on communal ties.”

Recent reporting suggests that push-ins from India into Bangladesh have already taken place on a significant scale. 

Between May 7, 2025, and January 26, 2026, Indian authorities forced 2,479 people over the border into Bangladesh, with Border Guard Bangladesh identifying 120 of them as Indian nationals. 

That is important not only because of the humanitarian and legal questions involved, but also because it shows how politically charged narratives around “infiltration” can produce real cross-border consequences, often without clear verification of nationality.

However, there are limits to how far these narratives can go. “In spite of such allegations of ‘illegal infiltration,’ it cannot go beyond a point to put Bangladesh in trouble,” said Chaudhury. “Is it possible to identify them as ‘Bangladeshis’ and return them so easily? I don’t think so.”

This gap between rhetoric and reality will be important. Bangladesh will need to watch not just what is said during the campaign, but what actually changes after the election.

The second area of concern for Dhaka is trade and connectivity. In theory, both countries have committed to improving economic integration. But the reality has been more uneven. 

Since 2025, trade relations have faced disruptions, including the withdrawal of certain facilities and new restrictions. However, the total bilateral trade still surged. 

The election outcome could influence how these issues evolve. A BJP victory might improve coordination between the state and central governments, potentially easing logistical barriers. But it could also bring more political tension, which may offset economic gains.

A TMC victory, on the other hand, may keep state-level interactions more pragmatic, even if differences with the central government continue. “Irrespective of the results, the overall everyday Bangladesh–West Bengal relations are likely to improve gradually,” said Chaudhury of Rabindra Bharati University, “because of the historical, cultural and economic ties. However, the ‘undocumented migrant’ issue is likely to be hyped again during polls.”

The third and most complex issue is water-sharing. The dispute over the Teesta River remains unresolved, largely due to opposition from the TMC. In 2011, Banerjee famously blocked a proposed water-sharing treaty for the Teesta that had been reached under India’s previous government. At the same time, the Ganges water-sharing treaty is set to expire in December 2026, adding urgency to the situation.

“It seems unlikely the two sides could break the deadlock, but it is not impossible,” said Kean of the International Crisis Group. “If the BJP wins West Bengal, then an obstacle to reaching an agreement on Teesta would be removed.”

“Mamata Banerjee blocked the signing of the draft agreement reached in 2011 and has been consistent in her opposition to a water-sharing deal, citing water shortages in West Bengal during the dry season,” he added.

“A BJP victory therefore increases the possibility of progress but I would still be very cautious. We don’t know if New Delhi ever really intended to sign the agreement back in 2011, and there are very real local pressures in West Bengal against water-sharing, which are not going to disappear.”

“For these reasons I think a treaty is unlikely,” Kean concluded. “What we might see is some renewed progress, if only so New Delhi can continue improving ties with Dhaka. This would also help to counter China.”

“Perhaps a more realistic goal in the shorter term is renewal of the Ganges treaty. That would be less contentious although Bangladesh will likely want to see a larger allocation during the dry season.”

Haque said that a water-sharing deal on the Teesta “depends more on the relationship between Dhaka and Delhi than on who governs West Bengal.” He added, “Even if the BJP wins, that does not automatically guarantee progress.”

If the TMC returns to power, the situation is unlikely to change significantly. “The prospects do not improve much,” Haque said. The “TMC has been very clear that it prioritizes West Bengal’s own water needs so the chances of progress on Teesta remain quite limited.”

This creates a difficult trade-off for Bangladesh. One outcome – a TMC victory – offers a more comfortable political environment but limited progress on water. The other – a BJP win – offers a possible opening on water negotiations but comes with uncertainty.

When it comes to minority politics and communal signalling, local developments in West Bengal can quickly affect bilateral relations.

Campaign rhetoric has increasingly focused on identity issues, including religion and migration. Such narratives resonate strongly across the border, shaping public opinion in both countries.

“Bangladesh’s geography itself becomes a tool in political narratives,” said Haque. “This creates a certain strategic anxiety and that feeds into political rhetoric. So Bangladesh becomes a convenient subject for political mobilization there [in West Bengal].”

This dynamic is unlikely to disappear after the election. “Whether in power or opposition, the BJP will continue using these issues,” he said. “The intensity may vary, but the underlying dynamics will remain.”

Finally, there is the broader diplomatic context. Relations between India and Bangladesh have become more fragile since the political upheaval of 2024. Suspicion and mistrust have increased, even as both sides express a desire to improve ties.

Despite this, the fundamentals of the relationship remain strong. Trade, connectivity, and security cooperation create mutual dependence that neither side can easily ignore.

“India-Bangladesh bilateral relations are likely to remain insulated from the Bengal poll outcome,” said Chaudhury, pointing to the deep complementarities between the two countries.

“I’m reasonably confident that the two countries can keep their relations on an even keel,” said Kean, noting that both sides still see it in their interest to improve ties despite recent tensions.

In the end, the real story will not be the election result itself but what happens after. Border enforcement, trade flows, water negotiations, and political messaging in the months following the vote will matter far more than campaign speeches.

For Dhaka, the challenge is to stay alert and respond carefully, as ties that remain crucial could also become more difficult to manage.