Suspended Brazilian President Dilma Rousseff's attorney in the impeachment proceedings, Jose Eduardo Cardozo (L), speaks during the final session of debate and voting on Rousseff's impeachment trial in Brasilia, Brazil, August 30, 2016. [Photo/Agencies]

"It is a constitutional remedy to which we must resort when the situation is particularly serious," Paschoal said.

She said the people called for Rousseff's impeachment.

Rousseff is charged with spending without congressional approval and manipulating government accounts in the run-up to her 2014 re-election.

She was suspended on May 12, for up to 180 days.

Her impeachment is widely regarded as inevitable among local politicians and mainstream media outlets.

Rousseff, who defended herself in the Senate on Monday, was interrogated by senators for over 12 hours till midnight. She denied any wrongdoing and called the impeachment "a coup."

Though Rousseff's defense in the Senate was regarded as firm and coherent, it is unlikely to turn the tide in her favor, analysts said.

If found guilty, Rousseff will be removed from office definitively while her former Vice-President Michel Temer will be confirmed as the new leader for the rest of Rousseff's four-year term through 2018.

The 75-year-old Temer, if confirmed as president, will face serious challenges, including an economy deep in recession as well as an investigation into the state oil company Petrobras.