Sen. Marco Rubio Issues Warning About WikiLeaks

Rubio, a former Republican presidential candidate, tells ABC News' Jon Karl Republicans should be wary to "capitalize politically" on the hacked on Democratic leaders' hacked emails.
2:31 | 10/19/16

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Transcript for Sen. Marco Rubio Issues Warning About WikiLeaks
let's bring in ABC's Jon Karl who is also there in Las Vegas with a look at the latest polls heading into this showdown. Now, before we get into the poll, let's talk about something else here, because wikileaks e-mails expected to be a hot topic in tonight's debate. And you are learning that there's a warning to trump from a top Republican about this. Reporter: Yeah, this is significant, robin. Marco Rubio, senator Marco Rubio says these are stolen e-mails hacked by the Russians and that they shouldn't be used. This is what he tells ABC news, these leaks are an effort by a foreign government to interfere with our electoral process and I will not indulge it. Further, I want to warn my fellow Republicans who may want to capitalize politically on these leaks, today it is the Democrats, tomorrow it could be us. So Rubio says trump should stop talking about the wikileaks revelations and that he will do so himself. That warning is raising a lot of eyebrows so let's get to those all-important polls, especially in the battleground states. Where do things stand there and what issues seem to be really be resonating with voters there? Reporter: Well, the big picture across all these battleground states is you see real momentum for Hillary Clinton and a downward trend for Donald Trump. But three of the states that remain close, the first is Ohio, this is probably the best battleground state for Donald Trump. Up 48/44. The big animating issues here are trade and the economy. That's where trump has the advantage, of course, he wants to rip up some of those trade deals, tougher negotiation, that message is resonating in Ohio. In Florida, you see the mirror image. You see Hillary Clinton on the rise and in Florida, what we're seeing in the polls is that experience and foreign policy are the top issues and that voters are giving Hillary Clinton an advantage there. And then finally right here in the state of Nevada this is very much a battleground state, a tight state if you look at this, 46/44 in the latest poll that's within the margin of error, slight lead for Hillary Clinton. The animating issue here is immigration. Of course, Donald Trump wants to build that Washington and Hillary Clinton has the opposite position here. She supports a path to citizenship for the 11 million or so undocumented immigrants in this country. The difference couldn't be more shark. A lot of hispanics in this state and that is advantage at least so far Hillary Clinton. It does appear that way, all right, Jon, busy day ahead for you and night as well. David. Meantime, we have our

This transcript has been automatically generated and may not be 100% accurate.

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