Al Gore's Peace Prize
Al Gore won the Nobel Peace Prize for his allegedly powerful pseudoscientific slideshow presenting the "dangers" of global warming. In addition to the fact the the Nobel Peace Prize now officially has nothing to do with peace, this now could mean that Gore will consider another Presidential run.
If he does, Hillary Clinton will be hurt. Gore is now looked to as a great philosophical guru by the left. Hillary Clinton, on the other hand, is seen as an "electable" candidate. If Gore gets in, he will destroy Hillary's much worked for "aura of inevitability", and apart from that, Hillary has very little. In addition, Gore has been a more or less clean slate on Iraq, giving him the luxury of waiting to see what is the popular position to take on the war, then taking it. In addition, Gore has a rather pleasant personality, unlike Hillary, with her screeches and cackles. If Gore runs, he would give the Democrats a nearly perfect Presidential candidate.