Despite the Electoral College process not typically commanding much attention.
The Republican incumbent is still disputing his loss of 232 Electoral College votes to Mr Biden’s 306.
Given Mr Trump’s legal challenges which have been rejected in several courts across the country, the state-by-state vote is under an intense spotlight today.
Vermont, New Hampshire, Indiana and Tennessee were among the first states where electors gathered in capitals (or in Washington DC) on Monday to formally cast their votes.
The vote is expected to see Mr Biden pushed well above the 270-vote tally required to win the presidency.
The US Constitution clearly outlines that electors, not voters, select the president and vice president.
Once the voting process is complete, the votes will be sent to Washington where they will be formally counted in a joint session of Congress on January 6.
This process is presided over by the incumbent Vice-President Mike Pence.
The US President-Elect plans to address Americans on Monday evening after the electors have voted.