Brazil’s top electoral court will today start hearing evidence in a case against President Michel Temer, which could see him removed from office.
Judges reopened a probe into allegations that Temer received illegal campaign funding in 2014.
A decision could be weeks or months away but protesters are calling for immediate fresh elections.
Dantas de Oliveira, the President of the Central Workers Union of Brazil, said: “Not Dilma. Not Temer. We want these people to leave the Brazilian political scene and let the people choose a leader directly, someone who will take the country where the people want it to go, via general and direct (elections) for President and the National Congress.”
Michel Temer was the running mate in 2014 of leftist President Dilma Rousseff. He replaced her when she faced impeachment last year.
Temer denies the charges against him, including separate claims of corruption, racketeering and obstruction of justice.
The Supreme Court authorised an investigation against him last month.