“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 CruzTed CruzMcCain votes to advance ObamaCare repeal, replace after vowing to oppose Senate rejects ObamaCare repeal, replacement amendment Senate Dem: We’re trying to block a recess appointment to replace Sessions MORE (R-Texas) said of Paul’s message.

The last talking filibuster in the Senate took place in 2010, when Sen. Bernie SandersBernie SandersOvernight Healthcare: Senate votes to begin ObamaCare repeal debate | McCain returns to vote | GOP floats scaled-down healthcare bill OPINION | Healthcare vote a political death wish for GOP in 2018 Senate parliamentarian: More parts of ObamaCare repeal will need 60 votes MORE (I-Vt.) held the Senate floor for eight hours in protest of an agreement to extend Bush-era tax rates.