Some Democrats in tough races are returning their invitations to the Democratic National Convention with a note attached: Thanks, but no thanks.... Democrats aren't the only ones thinking twice about showing up for their party's big party. Former Hawaii Gov. Linda Lingle, a Republican seeking a Senate seat in liberal-leaning Hawaii, said she won't attend the Republican National Convention in Tampa, Fla., in late August. The same holds true for Rep. Denny Rehberg, R-Mont., and former Rep. Heather Wilson, R-N.M. Both are seeking Senate seats.