If the 2020 presidential campaign is a marathon, President Donald Trump and former Vice President Joe Biden are starting the 26th mile.

As both campaigns are stumping, millions of voters have already taken part in the political process.

With Election Day 2020 just two weeks away, more than 28 million Americans have cast their ballots early.

"Democracy is not a spectator sport. It's not for bleacher bums. You got to get involved, so that's why I'm here and I'm going to do my democratic duty," says Eugene Wallace, PA voter.

Over the next 14 days, voters will decide whether to have another term with the Trump administration.

"With your continued support every day between now and Nov. 3, we're going to have a great victory," says Vice President Mike Pence. Or they will start a new year with a Biden White House.

"Justice is on the ballot in 2020. Economic justice is on the ballot in 2020. Climate justice is on the ballot in 2020," says Sen. Kamala Harris. Trump and Biden are scheduled to debate for the second and final time this Thursday.

The commission on the presidential debates announced microphones will be muted to prevent interruptions.

President Trump confirmed he will be attending.

Meanwhile today, President Trump is making a campaign stop in the battleground state of Pennsylvania.

Democratic hopeful Biden is taking a few days off the campaign trail before Thursday's debate.

However, officials tell CNN former President Barack Obama is expected to start campaigning for Biden this week.