I am a republician, and I do not like GW. Looking in retrospect, John McCain would have been a much better President.
And as for Lieberman, he would have had zero chance at winning a national election. There are waaaaaaaaaay to many people in this country who couldn't vote for a Jewish President. Think about places like Klan country and imagine them voting for Lieberman... No matter how good of a canditate he is, it won't happen.