Twelve Senators

FillibusterFrist.com has a list of twelve Republican senators (and phone numbers) who are considered possible no votes on the nuclear option:

• Susan Collins (ME) - (202) 224-2523
• Mike DeWine (OH) - (202) 224-2315
• Judd Gregg (NH) - (202) 224-3324
• Chuck Hagel (NE) - (202) 224-4224
• Dick Lugar (IN) - (202) 224-4814
• Lisa Murkowski (AK) - (202) 224-6665
• Pat Roberts (KS) - (202) 224-4774
• Gordon Smith (OR) - (202) 224-3753
• Olympia Snowe (ME) - (202) 224-5344 Converted!
• Arlen Specter (PA) - (202) 224-4254
• John Sununu (NH) - (202) 224-2841
• John Warner (VA) - (202) 224-2023

Six of the twelve are needed to keep the Republicans from tearing down the checks and balances that have been honored as part of two centuries of Senate tradition. One can only imagine the pressure being brought to bear on these twelve, half of whom represent red states.
Notably the list of possible dissenters does not include three GOP members of the Foreign Relations Committee (Lincoln Chafee, George Voinovich and Lamar Alexander), who are less than enthusiastic about the Bolton nomination and John McCain, who is hoping to negotiate to prevent the nuclear option. Taken together we have 16 of 55 Republican senators who are at least considering dissenting from the party line on two high profile votes this week.