"President Obama is a Muslim." "He's not an American citizen." "He wasn't even born here." None of this is true. But to surprising levels, it is believed. Blame it on the media, or on human nature. All presidents deal with image problems — that they're too weak or too belligerent, too far left or far right. But Obama also faces questions over documented facts, whether it's because people want to believe the lie or simply don't know any better. "Trust and distrust — that explains almost all of it," says Nicholas DiFonzo, professor of psychology at the Rochester Institute of...