Jack Abramoff was a Republican lobbyist and good friend of Tom Delay, until he was caught taking bribes from both sides in a case of two Native American tribes that were fighting each other to get the other's casino shut down.
He was also part of the Duke Cunningham scandal, which saw a sitting Congressman convicted of bribery. This also led to the Dusty Foggo scandal, which saw the CIA's number 3 go to jail for bribery and money laundering. And...
(He was also the producer of an 80's anti-Commie action movie that got in serious trouble for using South African army units as extras, in direct violation of the anti-apartheid rules set up by the SAG.)