Speaking at the first of five rallies in his final full day of campaigning, Trump railed against the Supreme Court for recent rulings not blocking Pennsylvania and North Carolina from accepting absentee ballots postmarked by Tuesday for several days after Nov. 3 -- stopping, at least for the moment, GOP efforts to stop counting ballots on election night. 

"What a horrible thing they've done. You know that puts our country in danger. Do you know what can happen? Cheating can happen like you've never seen. This is their dream," Trump said, without any evidence.

He went on to warn of voter fraud if states can continue counting mail-in ballots in the days after the election, demanding results be tabulated on election night -- though votes are always certified in the following days and sometimes weeks. 

“What can happen during that long period of time is a disgrace,” Trump said. "Our Supreme Court, I'm just so tired of some of these horrible political decisions that are being made. It's a shame. You know, I won't get into it too much. I'm going to start getting into it because they're hurting our country very bad."

Although Trump has projected confidence in winning the election, he also said "if" we win Pennsylvania when speaking to the North Carolina crowd, in perhaps a show of uncertainty in that critical battleground. 

"I think if we win this state, we win Pennsylvania -- we’re going to win Florida. We win Pennsylvania and you, we’re going to win the whole thing," Trump told the massive, mostly maskless, crowd.

Vice President Mike Pence, taking his closing message to roughly 200 people at an airport hangar in Latrobe, Pennsylvania, this morning made a big push for supporters to get out and vote either by getting their ballots in today or in-person voting Tuesday.

"Men and women, the time for speeches is over. The time for voting is on. So I want you to leave here today, you can drop that ballot off or just make plans to be out tomorrow, but spend every free moment that you have reaching out to neighbors and friends," Pence said. 

Pence also teased his joint appearances with Trump this evening in Michigan, including the final rally in Grand Rapids, where he said they will "bring it home."

Joined by his family, all of whom were seen wearing masks today, Pence didn't acknowledge rising COVID-19 cases and hospitalizations in Pennsylvania, but he did say the administration is working on a vaccine "to put this pandemic in the past."

-ABC News' Justin Gomez

Republicans in Texas asked a federal judge on Monday to throw out 127,000 votes in Harris County the day before the election -- in a move Democrats are calling voter suppression.

The votes were cast early via a secure "drive-thru" method that Harris County says it got state approval for back in June amid safety concerns with voting in a pandemic. But Republicans argue the Harris County Clerk was acting on his own by implementing the practice.

A similar lawsuit was rejected by the all-Republican Texas Supreme Court last week and then a second time on Sunday -- a blow to Trump and Republicans who have pushed claims of voter fraud, without evidence, in response to the rulings.

Notably, Texas did not allow for no-excuse absentee voting during the pandemic as other states did, so the drive-thru voting option was developed to ensure at-risk people could vote from the safety of their cars.

At each of the 10 drive-thru centers, voters pulled up in their cars, and after their registrations and identifications were confirmed by poll workers, they were handed an electronic tablet through their car windows to cast ballots. 

Harris County, the state's most populous county which leans Democratic, has already set an all-time record for total turnout -- and these drive-thru votes amount for roughly 10% of the total early vote turnout.

-ABC News’ Jon Schlosberg