Rebekah Kennedy, a member of the Green Party in Arkansas, has announced that she will challenge Sen. Mark Pryor next year. It’s a bad sign when the Green Party has a candidate before the GOP does, but this is good news. Pryor remains the odds-on favorite in the race regardless of which Republican decides to take him on, but should former Gov. Mike Huckabee change his mind and run for Senate instead, Kennedy’s announcement could help to make this race competitive. For now, though, this is only a thorn in Pryor’s side and more reason for him to prepare himself for a race, just in case.