President Trump tweeted on Friday that he will not be attending President-elect Joe Biden's inauguration on Jan. 20.

Why it matters: It's a break from tradition that comes as Trump faces massive backlash over the storming of the U.S. Capitol by a mob of his supporters.

The big picture: Trump released a video Thursday night acknowledging that a "new administration will be inaugurated on Jan. 20," and stating that he will focus on a "seamless transition of power" — one day after his continued and baseless claims of a "rigged" election led to the violent insurrection at the Capitol.

• The apparent concession speech came as the president faces White House resignations, abandonment from once-loyal Republicans, and the threat of a second impeachment by the House.
• The chaotic events of Wednesday had fueled speculation that Biden's inauguration, which will be significantly pared-down due to the pandemic, could be disrupted by Trump supporters.

What they're saying: Biden said at a press conference Friday that Trump not coming to his inauguration is "one of the few things he and I have ever agreed on."

• "He exceeded even my worst notions about him," Biden said. "He's been an embarrassment to the country, embarrassed us around the world. He's not worthy to hold that office."

Go deeper: House Democrats moving toward second impeachment as Trump offers meek concession