Is Marco Rubio getting 'Trumped'?

This is a rush transcript from "On the Record," July 29, 2015. This copy may not be in its final form and may be updated.

GRETA VAN SUSTEREN, FOX NEWS HOST: Right now, Republican presidential candidate and senator, Marco Rubio, joins us to go "On the Record." Good evening, sir.


VAN SUSTEREN: Senator, you came off against -- released making a statement about Secretary of State Hillary Clinton, wanting to reset with Castro and making some reference to her reset with Putin, why?

RUBIO: Well first of all, we have foreign this policy under this President that began in the four years Ms. Clinton was the Secretary of State. And here's the notion, let's stand up to our allies, let's be tough on Israel, but let's appease our enemies. If we are nicer to Vladimir Putin, he will be nicer to us. If we are nicer to Iran, they'll do a deal with us. And if we accommodate Cuba from how Cuba's going to change, and they haven't changed, they won't change.

The only thing that's going to change in Cuba, with this opening that they've done now is the Cuban government that controls the entire economy, is going to have more money at its disposal, more money to terrorize its own people, more money to oppress its own people, and more money to conduct anti-American operations like allowing the Chinese and the Russians to use Cuba to spy against us from listening stations in the island.

VAN SUSTEREN: You mention Iran. Is there any part of the Iran deal that you find good about? I know that you're going to vote -- I suspect you're going to vote against it. But anything promising -- any wild chance it will go back to the drawing board.

RUBIO: No, there isn't anything promising in the deal. Because immediately thrown out by the fact that Iran is going to get $100 billion or more of cash, the lifting of all international sanctions, including the sanctions from the United Nations Security Council. They don't have to stop producing long range rockets. They get to swap out their outdated centrifuges for updated ones, and in ten years, they're going to be able to do whatever they want and basically walk into the nuclear club without the world being able to do anything about it. There's only one way forward. We need to defeat the Iran deal in Congress and then this argument that the administration has that the sanctions are going to fall apart, it is just not true. The most important sanctions in the world on Iran is the United States sanctions, and trust me, no German bank, for example, or French company is going to choose to do business in Iran over doing business in America. If given a choice, they're going to pick America every time.

VAN SUSTEREN: I think everyone agrees on both sides of the aisle, or any thoughtful person agrees that Iran can't get a nuclear weapon. How certain are you that this is a bad deal, 100 percent certain? Why do you think that Secretary of Kerry and President Obama think it is a good deal?

RUBIO: Well, I think they think it is a good deal because in their mind, they want an achievement. I guess Barack Obama wants to earn his Nobel Peace Prize, John Kerry wants to win one. And so for them, this is about achieving something. But the truth of the matter is, the only thing it will achieve is nuclear Iran in about ten years or less, and an arms race in the Middle East. The Saudis, the Egyptians, the Turks, even the Jordanians have already said, whatever Iran has we're going to have. And so if you look at it, if you project this out over the next number of years as the sanctions come off, and Iran gains more access to capital and cash, they're going to use it to build their conventional military forces, to sponsor terrorism, to develop long range rockets that can reach the United States. And then in ten years there will be North Korea. We won't be able to do anything about it, because the price of a military strike could be an attack on Tel Aviv, or Jerusalem, or even the United States.

VAN SUSTEREN: I know that the first caucus is a long way off. But since Donald Trump got into the race, you're poll number going to real clear politics have gone down three points, two points. Jeb Bush has gone up 2.9 points. Any explanation -- is it related to Trump entering the race?

RUBIO: Well look, a lot of people are paying attention to what he is saying right now. I think other candidates have had a similar moment. But these polls are completely irrelevant, they really are. A poll in July of the year before the election has zero bearing on how people are going to vote in February in Iowa, or in New Hampshire, or in South Carolina, or in Nevada. And even the candidates themselves who know anything about this, would admit that themselves. I think everyone likes good news when it comes to polls, but they mean nothing. I have been higher in the polls than I am today, I have been lower.

The bottom line is this is like the pre-game warm-ups. The campaign is going to happen. Voters are going to have the chance to measure the candidates and listen to our messages. And then people will make a decision. Right now, most of America is on vacation somewhere, or most of America is getting ready to put their kids back in school in a few weeks. Let's wait for the campaign to start. In the meantime -- I mean I think these things make interesting horserace conversations for political pundits, but they don't really mean anything in terms of an election. What really matters is what our campaigns are about. And if you can answer the fundamental question of why do you want to be the President.

VAN SUSTEREN: Senator, nice to see you. Hope you come back.

RUBIO: Thank you, Greta.