Brazil's Minister of Tourism has resigned, adding pressure to embattled President Dilma Rousseff, BBC informed.
Opposition lawmakers want to remove Rousseff over claims she manipulated accounts to hide growing deficit.
Officials from her coalition allies, the Brazilian Democratic Movement Party (PMDB), will vote to leave the alliance on Tuesday, members said.
Tourism Minister Henrique Eduardo Alves became the first PMDB member to stand down from government on Monday.
"On Tuesday we will be disembarking from this government," Senator Valdir Raupp told media.
The PMDB is headed by Michel Temer, Rousseff's deputy, who would become president should she be removed.
Protests involving tens of thousands of people have taken place across Brazil to call for Rousseff's impeachment.
According to poll by the Datafolha poll in late February, only 11 percent of respondents across the country said the president's performance was "good or excellent".