Explainer-What happens when the U.S. Electoral College meets on Monday?

FILE PHOTO: U.S. President-elect Joe Biden announces nominees and appointees to his presidential administration during a news conference at his transition headquarters in Wilmington, Delaware, U.S., December 11, 2020. REUTERS/Mike Segar/File Photo

(Reuters) - President-elect Joe Biden is expected to take a major step toward cementing his Nov. 3 victory over President Donald Trump on Monday, when the 538 members of the U.S. Electoral College gather to cast their official ballots for president.

Here is what to expect.