As Republicans gradually move toward embracing revenue increases and maybe even tax rate increases on the wealthy in a deal to avert the "fiscal cliff," a number of Republicans have broken with their party's firm anti-tax hike orthodoxy.

But with so many moving pieces, it can be hard to keep track.

Below, The Fix is debuting its "Tax Defector Whip List," in which we list the Republicans who have broken with their party in one way or another.

We will update this list regularly as the situation develops, and make sure to head to the comments section to let us know if we've missed anything.

Would vote to allow tax cuts for wealthy to expire:

Sen. Bob Corker (Tenn.)

Sen. Tom Coburn (Okla.)

Sen. Susan Collins (Maine)

Sen. Olympia Snowe (Maine)*

Rep. Tom Cole (Okla.)

Rep. Kay Granger (Texas)

Rep. Mike Simpson (Idaho)

Rep. Robert Dold (Ill.)*

Rep. Charlie Bass (N.H.)*

Rep. Mary Bono Mack (Calif.)*

Rep. Steven LaTourette (Ohio)*

Have leaned toward violating Grover Norquist's anti-tax pledge but haven't fully embraced tax rate increases:

Sen. Saxby Chambliss (Ga.)

Sen. Lindsey Graham (S.C.)

Sen. Mike Johanns (Neb.)

Rep. Walter Jones (N.C.)

Rep. Peter King (N.Y.)

* denotes member who is leaving office when the new Congress is sworn in next month