Katrina coverup from Congress?

What kind of an investigation can we expect on Katrina? Not much of one, according to The Note from the political unit at ABC News:

Congressional Republicans have decided (for now) that their political interests (as in 2002 and 2004) lie in solidarity with the Bush Administration. "We shall all hang together" is the unofficial mantra, and the clearest manifestation of that is the decision to produce a congressional investigation process that is precisely what the White House wanted, in terms of timing, focus, and the make up of the committee. As of now, the investigation is likely to be as tough as any other that this Congress has done of the Bush Administration (which is to say: not very, or at all), and Democrats have no leverage to change that.

The poor families of the Gulf Coast are not as potent a force in Washington as the 9/11 families, and thus won't be able to force an independent review. That means a serious look — with the subpoena power the media lacks — of pre-Katrina FEMA funding and actions and other Administration vulnerabilities will likely not happen, and certainly not anytime soon.