[BillyBoy]

You seem to have overlooked Snarlin' Arlen MacSpecter, who not only "crosses over" to do the RATs bidding far more than Hagel, Warner, and McCain, but even Collins and Snowe.

[Milhous]

You seem to have overlooked Snarlin' Arlen

As far as we know Snarlin' Arlen stands on the right side of this particular issue.

Of the 55 Republicans in the chamber, at least six are undecided or adamantly opposed to the plan of using the rare parliamentary procedure to end the filibusters with a simple majority vote, rather than the 60 votes normally required.
Support falters for the 'nuclear option'