Good grief. Note to John McCain's campaign: if you're looking to mend fences and try to become the choice of conservative Republican primary voters, it's best not to go around trumpeting news of an endorsement by Senator John Warner of Virginia - especially after Warner just finished spearheading an effort in the Senate to rebuke the President and undermine his Iraq policy.

The endorsement game is really a bizarre phenomenon. I suppose, in the aggregate, endorsements offer a campaign the "aura of inevitability," but there's little evidence that individual endorsements (or newspaper endorsements, for that matter) really help, and I think this is an instance where an endorsement actually does more harm than good.