This isn't an "anti-incumbent" year, it's a Republican year

Conservatives certainly are angrier and more mobilized than I’ve seen them in years, and in many races they are lining up behind conservative candidates who criticize incumbent Republicans for not being conservative or confrontational enough.

And in a few Democratic primaries, more liberal voters and activists have taken on incumbents not identified with the party’s left (Specter and Arkansas Sen. Blanche Lincoln, for example).

But come November, we will have a rather traditional midterm election. Angry voters will turn out to vote against the party in charge. And that’s why, ultimately, 2010 will be remembered as a Republican wave election, not an anti-incumbent year.