AMNA NAWAZ: Former President Trump and Vice President Harris were out on the trail in neighboring states today.

Harris fired up some of her Republican supporters in battleground Arizona.

But we begin our coverage with former President Trump, who held a rally in Colorado, a state not seen as within his reach in this election.

In Aurora, Colorado this afternoon, former President Trump campaigned on crime and immigration.

DONALD TRUMP, Former President of the United States (R) and Current U.S. Presidential Candidate: I will rescue Aurora and every town that has been invaded and conquered.

These towns have been conquered.

Explain that to your governor.

He doesn't have a clue.

They have been conquered.

And we will put these vicious and bloodthirsty criminals in jail or kick them out of our country.

AMNA NAWAZ: Trump repeated lies debunked many times by local officials about Venezuelan gangs taking control of parts of the Denver suburb, delivering a familiar and false refrain about violent crime rates in America, which FBI data shows have been declining.

Vice President Harris, meanwhile, rallied in neighboring Arizona, her second straight day in the battleground border state, this time courting voters from across the aisle at a Republicans for Harris event.

KAMALA HARRIS, Vice President of the United States (D) and U.S. Presidential Candidate: Each of you have had the courage to say, hey, we may not agree on every single thing.

That's also what a democracy looks like.

But foundational first principles cannot be in question, not for the sake of our children, not for the sake of our future and well-being, not for the sake of our standing in the world.

AMNA NAWAZ: While running mate Tim Walz was in Michigan earlier today.

GOV.

TIM WALZ (D-MN), Vice Presidential Candidate: She's proud to be part of the most pro-labor administration in American history.

AMNA NAWAZ: Working to win over a group the campaign has struggled with, blue-collar union workers in battleground states.

BARACK OBAMA, Former President of the United States: Hello, Pittsburgh.

Are you fired up?

(CHEERING) AMNA NAWAZ: Former President Obama has joined that effort, rallying for Harris last night in Pennsylvania, and offering sharp takedowns of her opponent.

BARACK OBAMA: There is absolutely no evidence that this man thinks about anybody but himself.

(CHEERING) BARACK OBAMA: I have said it before, Donald Trump is a 78-year-old billionaire who has not stopped whining about his problems since he rode down his golden escalator nine years ago.

AMNA NAWAZ: Trump's running mate, J.D.

Vance, meanwhile, made headlines for what he wouldn't say.

QUESTION: Do you believe he lost the 2020 election?

AMNA NAWAZ: Refusing five times in an interview with The New York Times to say that Trump lost in 2020.

QUESTION: Senator Vance, I'm going to ask you again,did Donald Trump lose the 2020 election?

SEN. J.D.

VANCE (R-OH), Vice Presidential Candidate: Did big technology companies censor a story that independent studies have suggested would have cost Trump millions of votes?

I think that's the question.

QUESTION: Senator Vance, I'm going to ask you again.

Did Donald Trump lose the 2020 election?

SEN. J.D.

VANCE: And I have answered your question with another question.

You answer my question and I will answer yours.

AMNA NAWAZ: Vance refused last week to answer the same question during the vice presidential debate.

With polls consistently pointing to a razor-thin race... NARRATOR: Jill Stein.

AMNA NAWAZ: ... a new ad from the DNC today warned voters that backing third-party candidate Jill Stein could tip the results in Trump's favor.

NARRATOR: Stein was key to Trump's 2016 wins in battleground states.

She's not sorry she helped Trump win.

That's why a vote for Stein is really a vote for Trump.

AMNA NAWAZ: As both campaigns crisscross the critical swing states in these final weeks before Election Day.