Former President Donald Trump appeared on Sunday's NASCAR coverage, where he delivered a message focused on the economy in a one-minute clip.

"We've got to save our country, and it needs saving. It's in very bad shape. The worst economic numbers in generations,” Trump said, speaking directly to the camera while sporting his red MAGA hat.

Trump then declared: "We're going to end up in a depression based on what's been happening."

"Just remember Kamala and her friends broke it. I'll fix it. Most important election in the history," he said.

Trump’s appearance on NBC came as the network was required to follow FCC's Equal Time rule providing the same airtime as they allotted Vice President Kamala Harris during her "Saturday Night Live" appearance.

-ABC News' Lalee Ibssa, Kelsey Walsh and Soo Rin Kim

Attendees at Vice President Kamala Harris' rally in East Lansing, Michigan, on Sunday, told ABC News that they were confident in Harris' prospects because they knew Republicans in their community who are casting a ballot for Harris -- many of them secretly.

Andrea Galindo said she believes Harris will win "because I know a lot of Republicans voted Democrat."

Similarly, Linda Brundage, who has voted in 16 presidential elections, said she is sure that in her community, "Some of the people who say they’re red will vote blue."

Another attendee, Mike Arvizu, said his father-in-law is a lifelong Republican who is voting for Harris. "If my father-in-law can do it, there’s a lot more people out there," Arvizu said.

These voters' sentiments reflect a defining strategy of the Harris campaign: to reach every possible voter in battleground states, including Republicans and independents. In her final rally speeches, the vice president stressed that she would invite those who disagree with her to have a seat at the table.

-ABC News' Selina Wang

Vice President Kamala Harris' campaign said it had more than 90,000 volunteers knock on more than 3 million doors across all the battleground states over the weekend.

-ABC News' Gabriella Abdul-Hakim

At his third rally of the day, former President Donald Trump delivered his closing message to voters in Macon, Georgia.

"All I can say is, on Tuesday, just go out and vote, and we're going to close this thing out and it's going to be party time," Trump said, with two days to go until Election Day.

Planning a future second term in the White House, the former president said at the beginning of his administration, "It’ll be nasty a little."

"After all we have been through together, we stand on the verge of the four greatest years in American history. You watch, it's going to be so good, it's going to be so much fun. It'll be nasty a little bit at times, and maybe at the beginning in particular, but it's going to be something, we're going to go to heights that this country never has reached, and nobody ever even thought it could," Trump said.

-ABC News' Lalee Ibssa, Kelsey Walsh and Soo Rin Kim