Transcript for President Trump holds 5 rallies in 4 different states
Good evening and it's great to start another week with all of you at home. And what a year this has been a once in a century pandemic, so many American families effected. And tonight, we find ourselves on the eve of an historic election. Fueled by voters who want to vote safely in the this pandemic and who want to make sure their votes count. Tomorrow, millions more will go to the polls. President trump and Joe Biden rising the key battleground states today. President trump 408ding five rallies in four states today. All states he won four years ago, hoping to win them again. Energized by the size of his crowds, saying, this does not look like a second place finish. Joe Biden in Ohio and Pennsylvania, hoping to rebuild that so-called blue wall that collapsed for Democrats four years ago. Talking up his Scranton roots, where he grew up as a boy, calling on voters there to end a presidency that's divided the more than 97 million Americans have already cast their ballots. That's more than 70% of all votes cast four years age. And tonight, the numbers. Our partners at fivethirtyeight with the average of the national polling showing Joe Biden nationally with an eight-point as you know, though, it all comes down to the key battlegrounds. One of the most crucial states this time, Pennsylvania, where tonight, Joe Biden with a slim but steady lead, the fivethirtyeight average, just under five points tonight. Of course, there's no way to predict what will happen tomorrow night, but there are quite a few pathways both campaigns are studying. Tonight, we're going to carefully guide you through them right here. We begin with Jonathan Karl leading us off with the president's final push. Reporter: President trump may be down on the polls, but he's looking confident and predicting victory. Four more years! Four more years. This does not look like a second place finish. Reporter: He's making a frenzied final push, one rally after another, drawing some of his biggest and most enthusiastic crowds. We have five of these today. Five. We have some big ones. Thank you, thank you. Reporter: It extends beyond the rallies. In New York, trump supporters took over the Mario Cuomo bridge. In Texas, they menaced a Biden campaign bus on the highway. The FBI is now investigating. But the president praised his supporters. Do you see the way our people they, you know, they were protecting his bus yesterday because they're nice. Reporter: In the final hours of the campaign, the president is barely mentioning the pandemic. And he's lashing out at Dr. Anthony Fauci, the nation's leading expert on coronavirus. Fauci told "The Washington post" Joe Biden's campaign "Is taking it seriously from a public health perspective." Trump, Fauci said, is "Looking at it from a different perspective, the economy and reopening the country." In Florida on Sunday, the president responded to chants of "Fire Fauci" by suggesting that's exactly what he'll try to do after the election. Fire Fauci! Don't tell anybody, but let me wait until a little bit after the election please. Reporter: In a year where early and mail-in voting have shattered records, the trump campaign is counting on a big election day T operation, building on those crowds at the rallies. Tomorrow, you have the power to do sofor our country. You have the power to vote. So go out and vote. Unless you're going to vote for somebody other than me, in which case, sit it out. Reporter: Confident or not, the president is still making totally unfounded accusations that the election is being stolen from him. Especially when you know what goes on in Philadelphia and has been going on for years. So, governor, O open up your state and please don't cheat, governor. Please don't cheat. Reporter: Pennsylvania doesn't even begin processing its mail-in ballots until tomorrow. It's's%ed to last for several days. I think it's a terrible thing where people or states are allowed to tabulate ballots for a long period of time after the election is over. Reporter: But today, Ohio's secretary of state, a Republican, told ABC's powerhouse politics podcast that the counting always continues until every vote is counted, a process that takes time. The election night results are never final. That's not the way that elections work. Reporter: President trump has invited 400 guests to the white house tomorrow to watch election returns. Today, barriers are going up, walling off the complex to the world outside. Let's get right to Jonathan Karl tonight. And we heard the president demand that we know the election results tomorrow night on election night. But across the country, as you pointed out right there, elections officials are pushing back, saying that's not the way the system works. It's never worked that way. Networks make the projections, as we you a remember, but the states always cnue counting and after election night at some point, they certify the results. This year, of course, it's magnified because the millions trying to vote safely andly in this pandemic. Reporter: David, the fundamental principle of American democracy is that every vote counts. And as the Ohio secretary of state, who is a Republican, told me today, they will take the time to count all of those votes just like they always do. David? Which is why we are planning for a long night, perhaps several nights ahead. Jon, see you here tomorrow night.
This transcript has been automatically generated and may not be 100% accurate.