Rubio: Trump and Cruz feud makes for an 'interesting sideshow'
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Republican presidential hopeful Marco RubioMarco Antonio RubioIvanka must recalibrate her paid family leave plan to make it tenable The United States needs a career ambassador in Honduras Rubio in Colombia to push for delivery of humanitarian aid to Venezuela MORE on Wednesday mocked the bickering between Ted CruzRafael (Ted) Edward CruzO'Rourke mulling another Senate run as well as presidential bid Texas senator introduces bill to produce coin honoring Bushes Trump working on labels for 2020 Dems: report MORE and Donald TrumpDonald John TrumpTrump nominates Jeffrey Rosen to replace Rosenstein at DOJ McCabe says ‘it’s possible’ Trump is a Russian asset McCabe: Trump ‘undermining the role of law enforcement’ 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.