Email records, phone logs, hard drives, the whole deal, going all the way back to 2001.
Quoting TPM, quoting Rahm Emanuel:
…House Democratic Caucus Chairman Rahm Emanuel (D-Ill.) delivered a sweeping indictment of the White House’s political tactics in a speech at the Brookings Institution. "Instead of promoting solutions to our nation’s broad challenges, the Bush Administration used all the levers of power to promote their party and its narrow interests," Emanuel explained. He added that the Bush gang lives by a "guiding principle… insinuating partisan politics into every aspect of government."
Link.