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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 Antonio RubioTrump appears to confirm deal on Chinese firm ZTE Hillicon Valley: Experts worry North Korea will retaliate with hacks over summit | FBI works to disrupt Russian botnet | Trump officials look to quell anger over ZTE | Obama makes case for tighter regs on tech Putting pressure on Trump, House passes bill barring government from doing business with ZTE 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 Davis RyanDon't let them fool you — Republicans love regulation, too Senate harassment bill runs into opposition from House The Hill's Morning Report — Sponsored by PhRMA — The art of walking away from the deal 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.