Marco Rubio. REUTERS/Richard Carson Republican presidential candidate Marco Rubio did a whirlwind of Friday-morning interviews in which the Florida senator repeated the same line against Donald Trump.

Trump, Rubio stressed again and again — and again — is "a con artist."

Over at least three interviews, Rubio used the term more than a dozen times while describing Trump.

"If this pattern continues, the conservative movement and the Republican Party is going to be taken over by a con artist," Rubio said of Trump's momentum on ABC's "Good Morning America."

He later added of the conservative movement: "I'm going to fight now. Because there's no way ... I'm going to allow it to be taken over by a con artist. He says I'm a 'choker.' He's a con artist!"

At the CNN debate the night before, Trump and Rubio accused each other of regurgitating talking points, one of many fierce exchanges between the two GOP candidates during the event. Rubio also attacked Trump over his business record, foreign-policy views, and more.

Friday on CBS' "This Morning," Rubio was asked whether he had hit the "panic button" as the block of Super Tuesday voting states approached next week with Trump dominating in the polls.

"I don't know what you're talking about," Rubio said. "I can just tell you that a con artist is about to take over the Republican Party and the conservative movement. And we have to put a stop to it."

Rubio went on to accuse the media of propping up Trump to help the Democrats maintain control of the White House:

Unfortunately, he's being pumped up because many in the media with a bias know that he'll be easy to beat in a general election. So, we're going to put a stop to it now. There's no way that we're going to allow a con artist to take over the conservative movement. And Donald Trump is a con artist.

Rubio later said he didn't want to attack fellow Republicans but had to stop Trump:

I would prefer not to get into a fight with other Republicans. But I would much more prefer not to turn over the party to a con artist like Donald Trump ... If you're a Republican, and you don't want your party taken over by a con artist like Donald Trump, unite behind us.

And on NBC's "Today Show," Rubio said at various points:

We're on the verge of having someone take over the conservative movement and the Republican Party who's a con artist ... We are not going to turn over the conservative movement to a con artist ... Again, this guy is a con artist ...

If you want to stop this man, Donald Trump, this con artist, from taking over the conservative movement, then I ask you to go on our website, MarcoRubio.com, sign up, and help us. And we'll put an end to this lunacy.

Later in the morning, Rubio send a fund-raising email to his supporters with the subject line: "Trump is a con artist."

"Donald Trump is a con artist trying to hijack the conservative movement and the Republican Party, and he cannot be our nominee," Rubio wrote. "I need your immediate help to ensure he isn't."