You've heard the story. DeLay (along with 2 other Democrat congressman, but you wouldn't know that from the press) took trips that were paid for on Abramoff's (a lobbyist) credit card. The newest problem is that the FEC and lawyers for the House of Representatives OK's the setup.
So not only is DeLay being singled out for something that Democrats were on the same trip and did, but for taking a trip that the FEC and the lawyers for the House also OK'd as legit.
Now over 200 Representatives are running around getting their travel docs straight over a made up scandal. If you want the ethics committee to investigate something, maybe they should start with why they are giving apparently bad advice.