Brazil’s Senate has forged ahead with impeachment proceedings against President Dilma Rousseff, despite an earlier move by the interim house speaker to derail the process. The previous house speaker, Eduardo Cunha, had led the bid to oust Rousseff, before he himself was suspended over corruption. On Monday, his replacement, Waldir Maranhão, sought to annul the lower house’s vote in favor of impeachment charges, citing procedural flaws.

Waldir Maranhão: “I am aware that this is a delicate moment. We have the duty to save democracy through debate. We are not and will not be playing with democracy.”

But the speaker apparently reversed course in the middle of the night, releasing a statement revoking his decision, without explanation. The Senate appears poised to vote Wednesday on whether to put Rousseff on trial; if a majority side against her, she would be suspended. Rousseff has been accused of tampering with government accounts to conceal budget shortfalls. She has accused her right-wing opponents of mounting a coup.