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CPAC has long been a stopping point for GOP presidential aspirants. Rubio, who has spoken at previous CPACs in previous years, is seen as a likely contender for the nomination.

"My friend 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 has quickly become one of our nation's most prominent conservative leaders," American Conservative Union Chairman Al Cardenas said in the release announcing the news. "Sen. Rubio's participation will serve as motivation to CPAC attendees and conservatives across the country to take action and bring our country back on track."

Rep. Paul RyanPaul RyanOvernight Healthcare: Burwell huddles with Dems on fighting ObamaCare repeal Reid: Bring back the earmarks Ryan: GOP won’t ‘pull the rug out’ from 'Dreamers' MORE (R-Wis.) is already scheduled to speak at the event, as is former Sen. Rick Santorum (R-Pa.).

The three-day event, in its 40th year, will be held in mid-March.