Matt Labash

What's up with Keith Olbermann's strange obsession with STDs?  A few months ago, the Countdown host invoked "syphilis" in slurring Rush Limbaugh and Glenn Beck.  Olbermann had venereal disease on the noggin again tonight . . . Trying to trash Tucker Carlson for accepting sponsorship for his new Daily Caller website, Olbermann suggested that, for money, Carlson might consider endorsing "gonorrhea…