McCain has a primary opponent from the angry right

The punditry was obsessed over what the Scott Brown victory meant to Democrats. But, there are implications from the angry electorate for incumbent Republicans, too -- even for Senators who endorsed Brown, like John McCain.

Former GOP congressman, J.D. Hayworth, a truly hard-core right winger, is running in the GOP primary against McCain. And, that's well-received by at least one of the other right-wingers in the House:

A GOP congresman on Sunday backed former Rep. J.D. Hayworth (R-Ariz.) who announced Saturday he will primary Sen. John McCain (R-Ariz.)

Rep. Dana Rohrabacher (R-Calif.) became the first lawmaker to endorse the former radio host Hayworth's upstart bid.

In a Twitter post, Rohrabacher said:

McCain's wrong on too many big issues: #Immigration, #GlobalWarming, #Bailouts. @JDHayworth is better #AZ #tcot #Hayworth

Hayworth informed the Associated Press late Friday that he was stepping down as host of an Arizona talk radio program to run for Senate against the 2008 GOP presidential nominee.

A poll last week showed McCain with a 53% - 31% lead over Hayworth. Those are great numbers for a long-term incumbent, especially for a primary.

Not sure how Cindy McCain's support for same-sex marriage will help in the GOP primary.

The primary is August 24th, so Hayworth has some time. I can't imagine McCain appreciates this challenge.