Democrats on the committee said the panel issued 1,052 subpoenas to probe alleged misconduct by the Clinton administration and the Democratic Party between 1997 and 2002, at a cost of more than $35 million. By contrast, the committee under Davis has issued three subpoenas to the Bush administration, two to the Energy Department over nuclear waste disposal at Yucca Mountain, and one last week to the Defense Department over Katrina documents.

Some experts on Congress say that the legislative branch has shed much of its oversight authority because of a combination of aggressive actions by the Bush administration, acquiescence by congressional leaders, and political demands that keep lawmakers out of Washington more than before.