In light of Sarah Palin’s endorsement of Christine O’Donnell in the Delaware Senate primary, it’s worth recalling that she hasn’t always endorsed winning candidates. According to the Washington Post‘s Palin Endorsements Tracker (TM), 20 Palin-backed candidates have won, 10 have lost, and 13 haven’t faced voters yet.

But Palin has weighed in six times in GOP Senate primaries.*