Last Thursday there was a rally outside the U.S. Capitol to protest pending health care legislation, featuring the kinds of things we’ve grown accustomed to, including large signs showing piles of bodies at Dachau with the caption “National Socialist Healthcare.” It was grotesque — and it was also ominous. For what we may be seeing is America starting to be Californiafied.

Paul Krugman

The key thing to understand about that rally is that it wasn’t a fringe event. It was sponsored by the House Republican leadership — in fact, it was officially billed as a G.O.P. press conference. Senior lawmakers were in attendance, and apparently had no problem with the tone of the proceedings.

True, Eric Cantor, the second-ranking...