President Biden left the White House for the last time as commander-in-chief Monday morning alongside his successor (and predecessor), President-elect Trump. Why it matters: The historic moment likely marks the end of Biden's storied political career.

Joe Biden pardoned his siblings and their spouses on his way out of the White House, saying Monday that his family had been “subjected to unrelenting attacks and threats, motivated solely by a desire to hurt me — the worst kind of partisan politics.