Lula’s Runoff Lead Over Bolsonaro Narrows to 7.3 Points Weeks Before Brazil Election

President Luiz Inácio Lula da Silva’s lead over his main rival, Senator Flávio Bolsonaro, has narrowed to 7.3 percentage points in a potential second-round runoff, according to a poll released Tuesday by the National Confederation of Transport (CNT) and MDA Pesquisa. The poll finds the incumbent leader of the Workers’ Party (PT) receiving 47.3% of the vote against 40.0% for the Liberal Party (PL) candidate.

The tightening margin confirms the highly polarized nature of the 2026 presidential election, which is now just weeks away. Lula's 7.3-point advantage in the latest survey, conducted from September 9 to 13, is down from an 8.9-point lead recorded in the previous CNT/MDA poll in August. The narrowing suggests the right-wing opposition is successfully consolidating its base in the run-up to the first-round vote on October 4.

Senator Flávio Bolsonaro is the eldest son of former President Jair Bolsonaro, who is currently serving a sentence and is barred from holding office, but who remains the symbolic leader of the Brazilian far-right. The younger Bolsonaro, a Senator for Rio de Janeiro, is the official presidential nominee for his father's movement, known as "Bolsonarism". The CNT/MDA survey is respected in Brazil for its methodology, which involves face-to-face interviews with 2,002 people across the country, carrying a margin of error of 2.2 percentage points.

In the initial, first-round scenario, the poll indicates President Lula holds a commanding lead but still falls short of the absolute majority required to avoid a runoff. Lula registers 40.5% of the intended votes, while Flávio Bolsonaro holds 30.4%. If no candidate secures more than 50% of the valid votes in the October 4 first round, the top two finishers will face each other in a second round on October 25.

The consistent lead by President Lula in the first-round, combined with the gradual closing of the gap by Senator Bolsonaro in the runoff simulation, points toward a likely second-round contest and signals the effective re-mobilization of the conservative base by the Bolsonaro campaign. The coming weeks will focus on which candidate can win over the undecided and the voters of the other minor candidates.

What it touches

The political uncertainty injected by the narrowing lead adds an element of caution for investors as the election date approaches. Brazilian assets, including the national currency and local stocks, are sensitive to perceptions of political risk, and a tighter-than-expected election increases the focus on the expected fiscal and economic policies of both frontrunners.