Majority for Change

Obama here makes the argument that basically every primary challenger makes - that somehow they will be better able to attract a wider swath of voters in the general election. The question, I suppose, then becomes what change does he foresee offering and how does that differ from the various things Hillary has proposed doing if she wins the White House? Right now, the only things I can think of that Obama has argued for is a broken health care plan and for a renewed focus on "fixing" social security. It seems more and more with Obama, that there is very little substance to his campaign.