Oh, give us a break with your "I seriously doubt most conservatives would vote for Abraham Lincoln, either." Abraham Lincoln didn't buy into populist power-grab hoaxes such as today's Global Warming -- indeed, he had the guts to stand for the right thing even though it was unpopular; McCain shows no such social guts. Abraham Lincoln didn't push for permanent bans on free political speech 60 days before an election. Abraham Lincoln didn't side with Democrats to overthrow Republican strategies.
I seriously doubt you'd refrain from voting for Hillary Clinton if she switched to the Republcan party.