Vice President Kamala Harris and her running mate, Minnesota Governor Tim Walsh, wrapping up their campaign swing through battleground states tonight in Las Vegas. This, as polls show, the duo appearing to gain ground in some key swing states, Harris slamming former President Donald Trump on immigration and abortion. Trump's running mate, JD Vance, sitting down for an interview with our Jonathan Karl, insisting he would be ready to be President on day one. And tonight, the Trump campaign claiming that it was hacked by foreign sources, saying the intent was to interfere in the upcoming election. We have team coverage tonight. Abc's Zorin Shah leads us off from the campaign trail in Las Vegas.

Tonight, former President Donald Trump's running mate, forcefully defending his place on the GOP ticket. Last week, Trump would not say if Ohio Senator J. D. Vance would be ready to serve on day one. Vance responding in an interview with ABC's Chief Washington Correspondent, Jonathan Karl.

Most people, 99% of the country, they don't vote on who the vice presidential nominee, they're voting for Donald Trump or for Kamal Harris, not for J. D. Or Tim Walsh, right? But what I think that he does believe, because he made it the main focus of his vetting process, is, do I think this person can be President on day one if, God forbid, something happens? Yes. I absolutely am sure that Donald Trump is confident in my abilities. I also think that he's right, that the politics of this really don't matter that much.

Just one month from the presidential debate, Trump and vice President Kamala Harris holding dueling rallies out West. Tonight, Harris capping her blitz across the West in Nevada after slamming Trump in Phoenix, Arizona, on abortion and immigration, accusing him of killing a bipartisan border deal on Capitol Hill.

Donald Trump does not want to fix this problem. He talks a big game about border security, but he does not walk the walk.

In deep red Montana, Trump targeting Democrat John Chester and control of the Senate and working to define his new opponent.

We're going to evict Crazy Kamala. Do you know ever heard of Kamala? Radical left. Radical left.

Tonight, a new poll showing vice President Kamala Harris with a slight lead within the margin of error in three key battleground states, Pennsylvania, Michigan, and Wisconsin. At in one week from the Democratic Convention, Trump's still looking back to President Joe Biden's withdrawal from the race.

If we didn't have a debate, he'd still be there. Can you imagine? If we didn't have a debate, why the hell did I debate him?

And Trump was just in Las Vegas two months ago. He was trying to woo workers by proposing to make tips tax-free. Meanwhile, right before this rally, Vice President Kamlaher's got a major endorsement from the powerful Culinary Union. Those members will be potentially key when it comes to turning out votes in this swing state in November.Wit.Zarine.

Shah, thank.