When there isn't anything positive coming from anyone, it only makes sense for people to give the other side a shot. (as horrible as we know that could be)
At the very least, if you aren't offering anything positive AND have scandals pouring out of your ear, AND have a war that nobody articulates properly, AND have a spending problem, AND have people buggering kids in their offices...Well, people are gonna vote for the guy offering nothing positive that doesn't have all that other crap...