Dirtiest Campaign Ever?

I've got like two minutes in between my only little political battles. But, McCain's supporters are yelling out "off with his head" and "terrorist" at rallies. They promote the association with their speeches and their ads. Which is worse, suggesting your opponent is illegitimate, or that he is a terrorist. When John McCain was nominated, I thought well at least we'll have an above the board campaign. I was so wrong.