Obama is a disappointment on this issue, and other things too. But there are differences between politicians, and all this blah blah about how they are all the same is a great way to get apathetic and do nothing to improve things. It can be hard work trying to pick out the good ones from the bad ones, and maybe sometimes none of them are that good. And you may feel let down when you misjudge one. But that doesn't mean you just give up and spout platitudes about woe-is-us as an excuse for not doing anything, or no longer attempting to vote for good people.
Two politicians: Nelson Mandela and Joe McCarthy. No difference?