The best bit of Klein's post is down at the bottom:
Perhaps my favorite moment of last night’s debate was when Newt Gingrich fielded a question on health-care reform and warned that electing a president wouldn’t be enough. Republicans would also need Senate and House majorities to make change. It was a bucket of cold water tossed on the CNN promise-fest, and the other candidates promptly ignored it. But it was true for them and it’s true here. Our problem isn’t that our leaders don’t want to govern ambitiously. It’s that, in most cases, they can’t.I'm wondering whether it's an Iron Law of Politics that any time someone says some variation of "nobody supports..." it will turn out that someone is, in fact, supporting that thing, or proposing that bill, or promoting that program. And I don't mean someone as in some yahoo on the intertubes somewhere; I mean someone as in a governor, or a Member of Congress, or even (as was the case here) the President of the United States of America.
Oh, and there's a corollary: whenever anyone complains that if only the president would say [X] then all his problems would go away, the odds are high that the president has, in fact, already said [X].
And -- nice catch!