Rubio: Trump and Cruz feud makes for an 'interesting sideshow'
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Republican presidential hopeful Marco RubioMarco Antonio RubioFreedom to Compete Act would benefit many American workers Booker, Harris have missed most Senate votes Dems say attorney general undermined credibility with Trump talking point MORE on Wednesday mocked the bickering between Ted CruzRafael (Ted) Edward CruzBooker, Harris have missed most Senate votes O'Rourke sweeps through Virginia looking to energize campaign Disney to donate million to rebuild Notre Dame MORE and Donald TrumpDonald John TrumpButtigieg on Mueller report: 'Politically, I'm not sure it will change much' Sarah Sanders addresses false statements detailed in Mueller report: 'A slip of the tongue' Trump to visit Japan in May to meet with Abe, new emperor MORE, calling it an “interesting sideshow” in the presidential election.

“And I know all the press here is, 90 percent of their coverage is on this whole thing, ‘Oh, Donald Trump’s not going to show up, Ted Cruz is challenging him to a one-on-one, mano a mano debate,” Rubio said at a rally in West Des Moines, Iowa.

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“Interesting sideshow. Greatest show on Earth,” the Florida senator added. “This is not a show — this is serious. We cannot lose this election.”

“We are not going to win if this campaign becomes a sideshow.”

Rubio also said the feud between his rivals makes for “good television,” but warned it won't solve America’s problems.

“Our problems are real, and we need to confront them.”

Trump, the GOP front-runner, on Tuesday said he will skip Thursday night’s debate on Fox News due to his feud with the network.

Cruz later challenged the billionaire businessman to a one-on-one debate, insinuating Trump isn’t showing up because he’s afraid to defend his record.

The Fox News debate will be broadcast from Des Moines, Iowa, just days before the state’s first-in-the-nation caucuses.