It's important to note that Democrats have been against Social Security since B. Clinton, and have made more than one attempt to privatize it. Obama set up the Bowles-Simpson commission to cut Social Security, and forced a moron like Paul Ryan into the spotlight as an "expert."
Obama is now for Social Security, now that he's out of power and he can make promises that the administration doesn't have to keep.
> Obama set up the Bowles-Simpson commission to cut Social Security
Bowles-Simpson wasn’t about Social Security specifically, and it was set up deliberately with a supermajority rule that assured if it did something controversial, like touched Social Security in an adverse way, it would fail and fall short of the threshold for proposing policy changes at all, doing nothing.
Obama is now for Social Security, now that he's out of power and he can make promises that the administration doesn't have to keep.