It is possible that three or four prominent Republican Senate candidates–each one assumed easily on their way to their party’s nomination less than a year ago–could all be defeated by insurgent primary challengers.

The Teabaggers’ man in Arizona is not having a good week.

With the nation in an anti-incumbent mood, practically nobody in Washington is truly safe. Yet potential primary candidate J. D. Hayworth has a lot of baggage to lug in a run against McCain.