This part of the methodology makes about as much sense as asking squirrels who they will vote for.

Quote
Results are weighted to match demographic characteristics, such as race and gender, from the U.S. Census Current Population Survey and aligned to the 2012 presidential election outcome using self-reported vote in that election.

Emphasis is mine.

Another issue is they are asking the respondents who they "think" will win. That, in itself, is meaningless.

"The liberals can understand everything but people who don't understand them."
Lenny Bruce

"The cleverest of all, in my opinion, is the man who calls himself a fool at least once a month."
Dostoevsky