Both vice presidential candidates spent part of the final day before the election campaigning in Wisconsin, an indication of how critical votes there are in the deadlocked race.

Vice President-elect JD Vance has served in the United States Senate for less than two years, but after President-elect Donald Trump's victory in Tuesday's election, Vance is about to get a promotion to president of the Senate -- and leave his post as one of Ohio's senators.

JD Vance was once a bitter critic of Donald Trump. But by the time the former president tapped Vance to be his running mate in July, the Ohio native had become one of Trump's most ardent defenders and is set to become one of the country's youngest-ever vice presidents.