Here is some research for your next video:
Top 4 contributor is the National Thoroughbred Association. The IGT is also a major beneficiary of this land based conspiracy.
http://www.opensecrets.org/industries/contrib.asp?Ind=N07&cycle=2006
It seems like the gambling lobby placed its bets on G.W. Bush being reelected.
http://www.opensecrets.org/industries/recips.asp?Ind=N07&cycle=2004&recipdetail=P&Mem=N&sortorder=U
Top recipients of gambling money:
http://www.opensecrets.org/industries/recips.asp?Ind=N07&cycle=2006&recipdetail=A&sortorder=U
A lot more can be found here:
http://www.opensecrets.org/industries/indus.asp?Ind=N07&cycle=2006