Are Republicans getting antsy?

I've almost stopped paying attention to the senate's filibuster shenanigans. They go back and forth like children. I've been impressed by Harry Reid's doggedness and how smart he's played his card. And buried in this Times story about the fight is a line that might show the cracks in the GOP's armor:

Some lawmakers said they were exploring a resolution that would satisfy both sides without forcing a vote, but others itched for the fight.

"The sooner, the better," said Senator George Allen, Republican of Virginia, who said Dr. Frist should have acted before now.

Among a recent poll of GOP bigwigs, Allen was named the lead contender for the 2008 presidential ticket. When he's saying he's peaved with your current leader, at the very least you've got party discipline problems -- and possibly something much worse.