Rubio hits back at Christie

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Florida Sen. Marco Rubio hit back Sunday against presidential opponent Chris Christie, who said last week that Hillary Clinton would "cut his heart out" in a general election faceoff.

Rubio, a first-term senator, insisted that his relative youth and inexperience wouldn't hinder his ability to serve as president, although that's a criticism Republicans have often levied at President Obama.

"Obama's not a failure because he was a senator," Rubio said on ABC's "This Week." "He's got seven years of presidential experience and still he's making enormous mistakes, so clearly it is his ideologies that are flawed."

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