Watch: Joe Biden Hosts Final Campaign Rally With Lady Gaga

PITTSBURGH — Joe Biden and members of his campaign on Monday made several stops throughout Pennsylvania, ending the day with a final, star-studded appeal to swing state voters who could have a significant impact on the outcome of the 2020 presidential election.

At 7 p.m. on Monday, Biden and musician Lady Gaga are set to make the Democratic nominee's final appeal to voters from Pittsburgh. The rally can be watched live using the video player above.

Earlier in the day, Biden addressed members of Pittsburgh's African American community "about the power of the vote," according to his campaign.

Before arriving in Pittsburgh, the former Vice President stopped in Cleveland, Ohio, for a a last-minute get-out-the-vote event. He then swung by Beaver County to speak with union members and labor leaders about jobs and the middle class, KDKA reports.

Senator Kamala Harris and her husband, Douglas Emhoff, will sign off with a drive-in event in Philadelphia alongside musician John Legend, the Pittsburgh Post-Gazette reports.

President Donald Trump also campaigned in Pennsylvania on Monday before making his way to Wisconsin and Michigan, where his campaign will also come to a close with a 10:30 p.m. rally in Grand Rapids.

The Rust Belt states of Pennsylvania, Wisconsin and Michigan — along with Arizona, Florida and North Carolina — likely will determine who wins the election Tuesday, USA Today reported. Those six states represent 101 of the 270 electoral votes needed to win the presidency.

Pennsylvania — designated by FiveThirtyEight as the state most likely to tip the election — accounts for 20 of those votes. Recent polls show Biden holds a lead over Trump in Pennsylvania, but the latter was victorious in the state in 2016, narrowly beating Hillary Clinton.

Trump on Sunday said he probably would likely take legal action if he believes Tuesday's election is conducted unfairly, especially in Pennsylvania.

"As soon as that election's over, we're going in with our lawyers," Trump told reporters before a rally in Hickory, North Carolina.

Patch editor Eric Heyl contributed to this report