When I was younger, I believe I had the absolute monopoly on "truth." Now all I can say is that my experiences and culture produced my world view. Others can have their own view. Perhaps it was good this split happened, superficially based on the election, than you find out much later that the "friend" was no friend. It does hurt.
I am tired of arguing with people. Now I give money and time to promote my interests. The commercials and social media can convert people for me. I told the Obama campaign up front that I believed I had no right to influence people, merely to provide information if they wanted it. They gave me some weird looks. The parallels to religious intolerance are so strong.
What is a fleeting political campaign compared to the value of a friendship? There are so many topics to discuss besides politics. Today I don't even bring up politics or religion unless I have a good idea that it can discussed with mutual civility and understanding.
Your friend may have invested too much in the election. With the Senate and House controlled by different parties, the difference is not going to be drastic. I listen too much of what I consider nonsense but it is not my place to correct people in my version of truth. For some reason, not yet clear, Romney truly believed he would win. The media alerted me that Obama had a very narrow lead in the battleground states. When Sandy arrived, I was frantic that there would be a bad response and jinx the lead. I would not give up hope for a month or so.