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Marco Rubio addressed reporters before a campaign rally in Oklahoma City this afternoon and continued his verbal assault on Donald Trump.

Rubio reiterated his assertion that the Republican front-runner is a "con man" who's taking advantage of Americans' fears and anxieties.

"[He's] pulling the ultimate con job on the American public," Rubio said.

"He's a guy who portrays himself as some great businessman. He's had colossal business failures," Rubio said. "And he's built much of his empire by taking advantage of people who can't stand up to him. So we're going to unmask him ... we're going to work every day to make sure the conservative movement doesn't fall into the hands of someone whose policy positions are indistinguishable from Hillary Clinton's or Bernie Sanders'."

He acknowledged that Trump is the front-runner according to many polls, but he said that he won't allow Trump to win the nomination.

"There is no way we're going to allow the party of Reagan or the conservative movement to be taken over by a con man."

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