Rubio bashes Trump's profanity
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Marco RubioMarco Antonio RubioTrump must send Russia powerful message through tougher actions McCain, Coons immigration bill sparks Trump backlash Taking a strong stance to protect election integrity MORE is taking direct shots at Donald TrumpDonald John TrumpTillerson: Russia already looking to interfere in 2018 midterms Dems pick up deep-red legislative seat in Missouri Speier on Trump's desire for military parade: 'We have a Napoleon in the making' MORE, blasting the GOP presidential front-runner's "profanity" in South Carolina after mostly shying away from criticizing him in other states.

Rubio started Thursday by knocking his top rival on policy, declaring, “Donald Trump has zero foreign policy experience. Negotiating a hotel deal in another country is not foreign policy experience."

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Minutes later, The Washington Post reports, he offered another dig at Trump: “Even in our political culture I teach my kids to be respectful. There are certain words you don’t say."

“You turn on the TV and a leading presidential candidate is saying profanity from a stage," Rubio said during the campaign stop in the Palmetto State, according to the Post. "Profanity from stage."

Sen. Ted CruzRafael (Ted) Edward CruzSasse statement: Trump nominee who spread conspiracy theories has a ‘tinfoil hat’ Coalition of 44 groups calls for passage of drug pricing bill For the sake of our democracy, politicians must stop bickering MORE (Texas) earlier this week ripped Trump for his "profane insult" after the businessman indirectly called Cruz a "pussy" at a campaign event on the eve of winning the New Hampshire primary. 

Rubio is seeking a comeback after finishing fifth in New Hampshire. That poor showing followed a disastrous debate performance over the weekend, which he has vowed to never repeat. 

On Thursday the Florida senator opened up attacks on Trump, Cruz and former Florida Gov. Jeb Bush on foreign policy as the group battles in South Carolina ahead of the Feb. 20 primary.