This was predictable:

Yesterday, congressional Republicans tried to get a head start, announcing the formation of an [Katrina] investigative commission that they can control.

They rejected Democratic appeals to model the panel after the Sept. 11 commission, which was made up of non-lawmakers and was equally balanced between Republicans and Democrats. That commission won wide praise for assessing how the 2001 terrorist attacks occurred, and for recommending changes in the government’s anti-terrorism structure.