UPDATE: Brazilians March Against Impeachment of Rousseff

Brazilians in more than 15 cities marched Wednesday to show their opposition to efforts by right-wing politicians to oust President Dilma Rousseff from power through what they deem to be a “parliamentary coup.”

Earlier this month, embattled opposition leader Eduardo Cunha began impeachment proceedings against Rousseff, triggering a political trial that could see the president deposed before the end of her term.

"I'm here at the rally against the impeachment of President Dilma because, today, what we see on television and in the media is a coup. There is no compelling evidence for impeachment to proceed in a valid way,” Thiago, a demonstrator in Sao Paulo, told TVT.

IN DEPTH: Impeachment in Brazil

A samba group known as the “Batucada Popular: Carlos Marighella” plays as a crowd marches through Sao Paulo, Brazil, Dec. 16, 2015. | Photo: Levante Popular da Juventude

Organized under the slogan, “there will not be a coup,” the rallies and marches included the participation of more than 70 grassroots organizations, including the Landless Workers Movement, which has vowed to defend the Rousseff government and the country's democracy through street mobilizations.

Many of the slogans and banners at the rallies were aimed at Cunha, who is facing his own problems over his alleged involvement in a complex corruption scandal involving the state-owned oil company Petrobras.

A woman pretends to throw to the ground a man wearing a mask of Eduardo Cunha during a rally in Rio de Janeiro, Brazil, Dec. 16, 2015. | Photo: Levante Popular da Juventude

Cunha's home was recently raided by police and, despite his best efforts to avoid scrutiny, the Ethics Council of the Brazilian Chamber of Deputies has formally begun its probe that could see him removed from his post as Speaker of the Chamber.

Meanwhile, the Supreme Court will rule Wednesday on whether to allow the impeachment proceedings against President Rousseff to continue.

Demonstrators mock U.S. imperialism, private Brazilian media outlet Globo, and Cunha at a rally in Salvador, Brazil, Dec. 16, 2015. | Photo: Levante Popular da Juventude

The Brazilian opposition launched the impeachment process against Rousseff earlier this month on the grounds of illegal accounting practices.

On Tuesday, 50 federal deputies signed a letter to the Supreme Court calling for Cunha to stand down from his position as speaker while under investigation.

WATCH: Lawyers Call Impeachment Proceedings Illegal