Sen. Ted CruzTed CruzThe Hill's 12:30 Report Overnight Defense: Senators go to White House for North Korea briefing | Admiral takes 'hit' for aircraft carrier mixup | Lawmakers urged to beef up US missile defense Senators get North Korea briefing in unusual WH visit MORE (R-Texas) will keynote a major Tea Party gathering in Florida hosted by Americans for Prosperity, the group announced Friday night, a move that will further fuel speculation about his potential interest in running for president.


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Cruz, who has fast become a Tea Party favorite, will join Sen. Ron JohnsonRon JohnsonTrump tax plan prompts GOP fears about deficit Lawmakers targeted as district politics shift GOP rep doesn’t expect a literal border wall MORE (R-Wis.) and conservative commentator Michelle Malkin at the event, scheduled for Labor Day weekend in Orlando. Interestingly, Sen. Marco RubioMarco RubioWhat’s with Trump’s spelling mistakes? Boeing must be stopped from doing business with Iran Top Trump officials push border wall as government shutdown looms MORE (R-Fla.) has been previously announced as a speaker at the event, but was not mentioned in the group's release announcing Cruz.

The Texas senator is making all the necessary moves ahead of a potential presidential run: He's also set to visit Iowa twice this summer, and has already been to South Carolina.

Headlining an event of a major Tea Party organization whose primary backers are the powerful Koch brothers is just the latest sign that he's testing the waters on a potential presidential bid.