Christian and political affiliation

Billy Graham has a love for Jesus and for people to accept Jesus as their savior. In addition to reading the Bible, some of the first Christian books I have read were written by Mr. Graham. I remember reading transcripts of Billy Graham saying he was a Democrat on an episode of Larry King Live.
Many American Christians claim if you are a Christian, you must be, support and vote Republican. Nowhere in the Bible does it say, "If thou followest me, you must deny yourself and become Republican."
I agree on certain issues within the Republican party, yet I agree with certain issues within the Democrat party.
Those who are Republican and claim to be Christian have very potty-mouths when speaking about those who are not Republican or conservative. When a conservative makes a mistake or sins, they say God forgives them, but when a liberal backslides, conservatives pray God's wrath and fire to burn on those individuals. This reminds me of the Pharasiees(Biblical Republicans) who brought a woman caught in sex outside of marriage. They were ready to put her to death.
Jesus says, "Those who are without sin, cast the first stone." He then proceeded to write in the sand. One by one, those self-righeous men left. The story continues with Jesus offering to the woman grace, forgiveness, and a warning, "Go and sin no more."
I told this to a few of my conservative friends and they were not happy about my comparision of Republicans to Pharaisees. Yet, I was also showing how you could compare the Democrats to the Saducees.(denying spritual aspects and the resurrection.)
What my main jest in all of this is your faith in Jesus Christ should not be rooted in a politcal party. Political Parties are man created institutions. Thus, they are not perfect.
When it comes time to vote for a particular candidate, I see what Christ-like qualities the candidates possess. Both parties have Christ-like qualities. Both parties have very man-centered qualities. You pray to the Lord for guidence for each candidate so they may serve with God first in their lives. Then you go to the voting booth and choose the candidate best suit to lead in the position.
I like what author Jim Wallis has repeated in books and news interviews, "God is not a Democrat or a Republican." God is above all man made insititutions and is in control of world events.