GA Saxby Chambliss R (Several R candidates, Likely rat nominee is Sam Nunn’s daughter, she won’t win)
IA Tom Harkin D (I’d call it lean rat since the GOP is running second tier candidates)
MI Carl Levin D (I’d call it 50/50)
MT Max Baucus D (GOP Rep. Steve Daines is favored to win)
SD Tim Johnson D (Former GOP Governor Mike Rounds is heavily favored to win)
WV Jay Rockerfeller D
I believe every other Senator up has announced for reelection and none of them are on the fence