I won't defend his communications completely, sometimes he's providing answers that clearly he's not certain of. But there probably is a good reason for his lack of specificity.

It's pretty widely accepted that Obama opted not to follow the same process that lead to the failure of healthcare reforms during the Clinton administration. Back then, the White House presented "their" bill to Congress for passage--and after lots of bickering, nothing got passed. This time around, the President outlined the major objectives he said he wanted to see met by legislation, when he wanted it passed, and then left it up to Congress to come up with the detailed bill. There really isn't any White House-designed "Obamacare" as is being claimed by the entertainers on TV.

So when the POTUS waffles on specific questions, I'm guessing it's because he doesn't have the detailed answers because the various factions in the Congress--of course there's lots more than just two--are still arguing, bickering, and negotiating, both in public and behind closed doors. Is the WH trying to stay on top of what's going on? I'm sure they are. But I'm equally certain that keeping the WH and the POTUS completely up-to-speed on what's happening in the smoke-filled-rooms isn't exactly on top of the agenda of the 435 and the "advisors" they have from K Street.