The only current Senators that I consider RINOs, together with their "conservative percentage" for 2003-2004, are the following:
1. Lincoln Chafee (RI) 45.92%
2. Olympia Snowe (ME) 49.67%
3. Susan Collins (ME) 61.08%
4. Arlen Specter (PA) 72.50% (pre-primary posturing)
I don't consider McCain a RINO, but he scored worse than Specter during the 108th Congress (69.33%).
As for why DeWine is scoring far worse on the ACU ratings of late, I think it's a combination of (i) the choice of votes by the ACU (there are years in which the ACU emphasizes social issues less than economic or foreign issues, which helps guys like Specter and hurts guys like DeWine) and (ii) an actual leftward shift by DeWine as he has "grown in office." DeWine had an 85 ACU rating in 2003, followed by a 68 in 2004 and a 56 in 2005; hopefully he'll return to the 80s after he is reelected.
I think most Freepers think there are more than these four RINOs. Maybe RINO is a bad word, maybe undependable is better. Anyone below about an 88 is undependable. And a couple of votes the wrong way on critical legislation is enough to get someone branded for life, unless they can explain themselves.
</p>Maybe the undependables would be more dependable if we added 8 Conservatives in Red States and kicked out a bunch of liberals representing these states?