http://www.cbsnews.com/8301-503544_...tml?utm_medium=twitter&utm_source=twitterfeed "He has no fixed principles," Nader said, of Mr. Obama. "He's opportunistic -- he goes for expedience, like Clinton. Some call him temperamentally conflict-averse. If you want to be harsher, you say he has no principles and he's opportunistic." "He's a con man," Nader continued. "I have no use for him."