Sen. Rand Paul’s old-fashioned filibuster Wednesday against CIA nominee John Brennan has gained strength, with several Republicans and one Democrat joining him on the floor.

Paul began the filibuster at 11:45 a.m. to prevent Senate Democrats from ending debate on Brennan and moving to a final vote. The Kentucky Republican spoke on the floor for more than three hours by himself before he was joined by Sen. Mike Lee (R-Utah) — who, like Paul, is a favorite of the Tea Party Movement.

Paul’s effort is aimed at drawing attention to the administration’s drone program, which Brennan played a key role in administering as White House counterterrorism chief.

“I’m here to filibuster John Brennan’s nomination to be director of CIA,” Paul said on the Senate floor Wednesday as he began a long afternoon of speaking. “I will speak for as long as it takes.