Republican presidential candidate Marco RubioMarco Antonio RubioSenate votes to repeal OCC 'true lender' rule Democrats cool on Crist's latest bid for Florida governor Tim Scott sparks buzz in crowded field of White House hopefuls MORE on Friday cast doubt on rival Donald TrumpDonald TrumpKinzinger, Gaetz get in back-and-forth on Twitter over Cheney vote READ: Liz Cheney's speech on the House floor Cheney in defiant floor speech: Trump on 'crusade to undermine our democracy' MORE’s conservative credentials, framing him instead as a bully who doesn’t understand limited government.

“Conservatism is not about how offensive you’re willing to be,” Rubio told supporters in Overland Park, Kan. “Conservatism is not about how many people you’re willing to insult. Conservatism is not about how angry you seem to be when you talk. 

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“Conservatism is about ideas, that limited government works. If you elect me president, we are returning to limited government.”

Rubio was joined by former Sen. Rick Santorum, New Mexico Gov. Susana Martinez, and Kansas Gov. Sam Brownback, all of whom have endorsed the Florida senator. Kansas’ presidential caucuses are Saturday.

Watch the video above to see highlights of the rally.