Jonathan Chait, New Republic: "Obama's plan closely mirrors three proposals that have attracted the support of Republicans who reside within their party's mainstream: The first is the 1993 Senate Republican health plan, which is compared with Obama's plan here, with the similarity endorsed by former Republican Senator Dave Durenberger here. The second is the Bipartisan Policy Center plan, endorsed by Bob Dole, Howard Baker, George Mitchell and Tom Daschle, which is compared to Obama's plan here. And the third, of course, is Mitt Romney's Massachusetts plan, which was crafted by the same economist who helped create Obama's plan, and which is rhetorically indistinguishable from Obama's. (The main difference are that Obama's plan cuts Medicare and imposes numerous other cost-saving measures -- which is to say, attempting to craft a national version of Romney's plan would result in something substantially more liberal than Obama's proposal.)"
Be sure to read the comments as well: "the Republicans have moved so far from the center that the bill they offered 16 years ago is now an unconstitutional assault on our way of life."