Brazil’s President Lula and his Workers’ Party have formally asked the Federal Supreme Court to probe possible U.S. meddling in Brazil’s electoral process, including a case filed with the Superior Electoral Court alleging that Flávio Bolsonaro benefited from U.S. support.

A confidential Abin report warned at a high level about U.S. interference risks, arguing Washington seeks regional dominance to counter China’s influence.

Lula’s UN speech framed U.S. power as intrusive in Latin America, stressing that Brazil won’t be anyone’s backyard and signaling a message to Trump during a New York visit.

Analysts and Lula allies point to meetings between Bolsonaro and U.S. figures, plus funding concerns tied to the Rock-Bridge Network and tech figures linked to Peter Thiel, as evidence of external influence.

The petitions come as a coalition called the Shield of the Americas names 24 drug-trafficking groups as shared threats, a move Lula says reflects a broader U.S. push including tariffs and sanctions against Brazil.

Meta briefly blocked Lula’s campaign ads—then restored them—amplifying claims of U.S.-linked support for Bolsonaro.

Polling ahead of Brazil’s October 4 first round, with potential October 25 runoff, shows Lula leading by around five points and underscores concerns about foreign interference in the election.