“I’m here to filibuster John Brennan’s nomination to be director of CIA,” Paul said when first taking the floor on Wednesday. “I will speak for as long as it takes.” 

Paul said he’d continue his filibuster for as long as he could or until he gets answers from the administration on its drone program. Paul wants President Obama to say he will not kill U.S. citizens on American soil with drone attack if they are non-enemy combatant. He says U.S. citizens deserve due process.

Several GOP senators have joined Paul to help keep the filibuster going.

“The heart of what you’re standing for is liberty,” Sen. Ted CruzRafael (Ted) Edward CruzWhatever you think the Alabama special election means, you’re probably wrong This week: Congress gets ball rolling on tax reform Week ahead: Senators work toward deal to fix ObamaCare markets MORE (R-Texas) said of Paul’s message.

The last talking filibuster in the Senate took place in 2010, when Sen. Bernie SandersBernard (Bernie) SandersChris Murphy’s profile rises with gun tragedies Clip shows Larry David and Bernie Sanders reacting after discovering they're related For now, Trump dossier creates more questions than answers MORE (I-Vt.) held the Senate floor for eight hours in protest of an agreement to extend Bush-era tax rates.