There is a great article by Chuck Baldwin, founding pastor of Crossroad Baptist Church in Pensacola, Florida, titled: We Desperately Need The "Confessing Church" where he makes a very good comparison between the Christian Churches in Nazi Germany that supported Hitler, and the Christian Church today that supports Bush and the Neo-Cons (read all the Republican candidates except Ron Paul). This is a must read. The book he talks about is: Hitler's Cross.
Another pastor, Gregory Boyd takes on The Myth of a Christian Nation: How the Quest for Political Power Is Destroying the Church in the videos below the break.

[youtube]http://www.youtube.com/watch?v=HIWs_G4oJaA[/youtube]
[youtube]http://www.youtube.com/watch?v=NLTsefTbL1I[/youtube]
[youtube]http://www.youtube.com/watch?v=jBQPN0rVs1I[/youtube]
Now I may not agree with the two on everything, but they are hitting the nail on the head on lots of stuff here.