Representative Tom Davis opposes Congressional investigations because plaintiffs might benefit.
Carter Wood at Point of Law reports that certain members of the House Oversight Committee seem to think there's something wrong with overseeing:
Thankfully, some balance come from the ranking member of the committee, Rep. Tom Davis (R-VA), who gave an opening statement that reflected the real world difficulties that FEMA and the industry encountered after the disaster. Davis recounted the different reports on formaldehyde levels from tests conducted by the CDC and commented (our emphasis):
That leaves trailer occupants, already victimized by one storm, caught in a lingering tempest of post-Katrina political scapegoating, bureaucratic finger-pointing, and litigation. Once again the Committee risks being used as a discovery proxy for plaintiffs suing companies called to testify before us. Instead, we should be asking FEMA why contract requirements for habitable mobile units weren't more specific, why inspection procedures weren't consistent, and why heath concerns didn't trigger standardized testing and, where necessary, prompt remediation. We should be asking federal science and health agencies how to establish, and measure, workable standards for formaldehyde exposure in realistic settings.
Obviously, it's much better for Congress to sit on its hands and do nothing, rather than risk that they'll turn up misdeeds that may lead to litigation.