President Donald Trump faced the threat on Thursday of a second impeachment, a day after his supporters breached the U.S. Capitol in a stunning assault on American democracy as Congress was certifying President-elect Joe Biden's victory.

As Democratic leaders demanded his ouster, Trump came closer than he ever has to a formal concession, acknowledging a new administration would be sworn in on Jan. 20 and vowing to ensure a "smooth transition" in a video released on Thursday evening.