In the early morning hours Monday, President Jair Bolsonaro of Brazil went to bed vindicated. The night’s election results had shown, just as he had claimed, that the polls had severely underestimated the strength of his right-wing movement.

Hours later, he awoke to a new challenge: How to obtain millions more votes in just four weeks?

On Oct. 30, Bolsonaro will face a leftist challenger, former President Luiz Inácio Lula da Silva, in a runoff election to lead Latin America’s largest nation.