WASHINGTON -- Some Democrats in tough races are returning their invitations to the Democratic National Convention with a note attached: Thanks, but no thanks.
Sen. Claire McCaskill of Missouri is the highest-profile Democrat to announce that she'll skip the September event in Charlotte, N.C. So will Sens. Jon Tester, D-Mont., and Joe Manchin, D-W.Va.
At least 11 Democratic incumbents and front-running challengers will be no-shows, The Associated Press has counted. All hail from conservative-leaning or toss-up states where President Barack Obama could be a drag on down-ballot Democrats.