Rubio: 'We’re the underdog, and that’s a role that I relish'
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Republican presidential candidate Sen. Marco RubioMarco Rubio House passes water bill with Flint aid, drought relief What the 2016 election can tell us about 2018 midterms Fight over water bill heats up in Senate MORE (Fla.) denied on Sunday that his strategy for Super Tuesday is "survival," vowing to stay in the race "as long as it takes."

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"Obviously, we're not the front-runner here, we’re the underdog, and that’s a role that I relish," he said on CBS's "Face the Nation" Sunday morning.

"I’ve been an underdog my whole life, both in life and in politics, and we’re going to do well. We’re going to pick up a lot of delegates on Super Tuesday. As you know, they are awarded proportionally, and we’re going to move on."

He said the Republican Party will never rally behind presidential candidate Donald TrumpDonald TrumpTrump showcases Cabinet picks on 'thank you tour' Trump: Time changed award to 'Person of the Year' to be 'politically correct' Feinstein after dinner with Clinton: She has 'accepted' her loss MORE. He then hit on Trump, saying the billionaire is neither a Republican nor a conservative.

"Donald Trump is trying to pull off the biggest scam in American political history," Rubio said.

"Basically a con job where he’s trying to take over the Republican Party by basically telling people who he’s not, and so we’re going to do whatever it takes."

Rubio said he plans to stay in the race "as long as it takes" to win the nomination.