U.S. House Speaker Nancy Pelosi on Wednesday called Donald Trump a threat to American democracy.
She stated he left Congress no choice but to impeach him, reports Reuters.
Bitterly divided lawmakers debate before historic votes on charges of abusing power and obstructing Congress.
Trump would become the third U.S. president to be impeached.
That would set the stage for a trial in the Republican-led Senate next month.
House members would act as prosecutors and senators as jurors.