Its all cover your a$$.
The unions have a tough choice, support Obama who they helped elect and push this through, thereby screwing their members due to the Cadillac plan tax, or oppose it and lose influence in Washington as the ones who helped kill healthcare. They chose option C, call for a public option, which they know people don't want, but the radical left does. The public option goes in the final bill and the final bill loses to the Reps and Blue Dog Dems.
Same with Snow. She came out supporting the Senate Finance Committee bill, saying she's making history. The public option, which she already opposed, will be in the final bill that she can then vote against and say its because of the public option. She looks like the moderate Rep who tried for healthcare reform to Maine voters (who may favor reform with no public option, I have no idea).
Friggin' hypocrites, every single one of them.