Birtherism is alive and well within the GOP ranks, and their 2012 nominee preferences tell a story about the difficulty Mitt Romney faces in trying to appeal to an electorate that's a whole lot further out there than he is. Birthers make a majority among those voters who say they're likely to participate in a Republican primary next year. 51% say they don't think Barack Obama was born in the United States to just 28% who firmly believe that he was and 21% who are unsure. The GOP birther majority is a new development. The last time PPP tested this...