What he is trying to say is that its impossible to support Obama unless your head is buried in the sand. Logically, Obama has done nothing worth supporting. Base it off the past, present or future, giving him 4 more years would only simply dig us a bigger hole and most likely, hell, almost a definite calapse of this nation.
Basically if you got a tattoo from someone and they did a bad job 4 times(years) in a row, would you really give them more chances(years)?