His filibuster forces the maximum time on each pending piece of legislation, delaying votes on other matters — including the Veterans Job Corp Act — until her gets his way.

Paul sent a letter to Senate Majority Leader Harry ReidHarry ReidChris Murphy’s profile rises with gun tragedies Republicans are headed for a disappointing end to their year in power Obama's HHS secretary could testify in Menendez trial MORE (D-Nev.) about his bill, which would end all foreign aid to Pakistan until it releases Dr. Shakil Afridi, who remains in Pakistani custody and helped the CIA find Osama bin Laden.

“As you know, the number of work days in the 112th Congress is dwindling, and Congress may break for the November election as soon as next week,” Paul wrote. “Because of the urgency of seeing that Dr. Afridi is freed, I am prepared to pursue any and all means to secure a vote on my bill immediately, including objecting to other Senate business and recessing the Senate for the election.”

Paul said he is concerned about the safety of Afridi, who has a court hearing set for Sept. 27.  

"I will continue to work tirelessly to keep this issue front and center,” Paul said. “America should not give foreign aid to a country whose government is torturing the man who helped us kill Osama bin Laden.”