Brazil is set for a presidential run-off after right-wing challenger Flavio Bolsonaro won a surprise first-round victory, threatening Luiz Inacio Lula da Silva’s grip on power in South America’s largest economy. Bolsonaro, son of imprisoned former president Jair Bolsonaro, took 47 per cent of the ballots in Sunday’s election, beating out Lula on 45 per cent. Brazilians will vote again on October 25 as neither candidate got the 50 per cent share needed to claim outright victory. US-China...