Cost of Obamacare

Just wanted to post something, as I haven't been as on top of posting as I could be.  Krugman commenting on Steve Rattner's peice on Medicare and the Affordable Care Act.  I guess it would be good for me to read both articles that Krugman provides, Rattner's piece and Robert Reischauer's piece, so I can formulate my own opinion on whether double-counting is happening or not.