The chairwoman of the Senate Intelligence Committee says she expects the panel to vote later this week on the nomination of John Brennan to be director of the CIA.
Senator Dianne Feinstein said the White House has agreed to provide the committee with information about the September 11, 2012, attack on a US diplomatic mission in Benghazi, Libya, that killed the US ambassador and three other Americans.
Republicans had demanded the records as a condition of moving forward with Mr Brennan's confirmation.
But Ms Feinstein said the Obama administration has not responded to the committee's request for more details about the classified legal opinions that justify using unmanned spy planes to kill al-Qaeda suspects overseas, including American citizens.
Ms Feinstein said she anticipates the committee will vote on Thursday on Brennan's nomination.