So it looks as if at least one Republican Senator will break ranks with the GOP leadership tomorrow and vote in favor of Senator Majority Leader Harry Reid's new move to bring an anti-escalation resolution up for a vote. Jen Burita, a spokesperson for GOP Senator Susan Collins of Maine — who is facing a tough reelection in 2008 — tells Election Central that Collins is "very likely" to vote with the Dems on cloture.

Collins was one of only two GOP Senators who sided with Dems and called for the Warner resolution to come up for a vote — which GOP leaders succeeded in blocking. Collins also signed the recent letter demanding that the Senate not go on recess without voting on the resolution. Now that Dem Senate leader Harry Reid called their bluff and announced that the Senate would vote tomorrow on whether to bring the simpler House resolution to the Senate floor, Collins looks like she'll be backing it.

"She did say she's disappointed that Reid isn't allowing more open discussion," Burita told Election Central, referring to the GOP demand that Reid also call a vote on whether a competing GOP proposal being blocked by Dems can go to the floor. "But she's inclined to vote in favor of the motion to proceed, just like she did with the Warner-Nelson-Collins Resolution vote."

So that's one GOP Senator breaking ranks. We'll keep you posted on the others.