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Donald Trump promised during a rally last night that he would stop cursing on the campaign trail. 

After criticizing political "hacks" in front of a huge audience in Baton Rouge, Louisiana, Trump stopped himself from going any further. 

"I won't use foul language. I'm just not going to do it, I'm not going to do it," he said.

"Even if it's not a bad word, if it’s a little bit off they kill me, so I won't do it. I'll never do it again, actually," he promised.

Trump made headlines a few days ago for repeating a vulgar term that was shouted by someone in the crowd about Sen. Ted Cruz. 

Sen. Marco Rubio, campaigning in South Carolina, slammed Trump for his repeated use of vulgar terms. 

"There are certain words you don't say. ... You turn on the TV and you have a leading presidential candidate saying profanity from a stage! All these things undermine what we teach our children," he said.

So, will Trump really quit cursing at his rallies?

Martha MacCallum discussed that with Mary Katharine Ham and Juan Williams this morning. 

Watch the discussion above and let us know what you think: does Trump's foul language matter to you as a voter?

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