Here's some more on DeLay's outstanding record of ethical violations and corruption:

DeLay's Dirty Dozen

Some of these violations include:
Using money from a children's charity as cover for corporate donations DeLay spent on "dinners, a golf tournament, a rock concert, and Broadway tickets."
Taking a $100,000 check from a private prison company while considering a bill to privatize Texas prisons.
Going on a trip to Seoul, South Korea that cost $106,921, payed for by a South Korean lobbying group.

...and many more.

It seems that even if DeLay beats the charges of criminal conspiracy he is currently facing in Texas, he could still be removed from office on any number of criminal corruption charges -- although it is unlikely that will happen. Since most members of Congress are just as crooked as he is, and since even the honest members of Congress are under his thumb (he can destroy the career of just about any Republican who goes against him), there probably isn't anyone willing to hold him accountable.