So Jane wants to know which Senate Democrats would join a GOP filibuster against the public option?  I think we can identify at least one pretty easily…

Sen. Ben Nelson, a Democrat, said Sunday that he would vote against using a tactic called reconciliation to push through a health care bill.

A bill needs 60 votes — which also is the number of Senate Democrats expected when the vacant Massachusetts seat is filled — to move to final consideration using reconciliation. [No, I'm not sure where this came from either.  Between Nelson, the reporter, and myself, one of us is terribly confused.]

Nelson said health care legislation should be bipartisan and supported by at least 65 senators because it would have more credibility with the American people.

Silly me, I thought the support of three-quarters of the American people would give the public option all the credibility it needs, but I guess the American people don’t take themselves very seriously these days.  I blame the teabaggers.

The number 65 intrigues me.  If the Democrats can pick off just one Republican, then Nelson and his Magical Bipartisan Threshold become irrelevant… unless he has at least four friends in the Democratic caucus who will go along with his noble Broderian crusade.  It would explain his choice of such an arbitrary-sounding number – it’s actually defined by the size of his secret anti-reform coalition.

But not to worry, Ben Nelson is not totally unreasonable:

Nelson said Democrats have a responsibility to seek Republican support and the GOP has a responsibility to “look favorably on something and not just be against everything.”

So, in theory, there must be some threshold of mindless obstructionism that would convince Nelson that the Republicans are just against everything.  A "trigger," if you will.  At which point Nelson would sadly put his dreams of bipartisanship aside and jump aboard the public option express.  Because he’s only obstructing meaningful reform out of his love of bipartisanship, and not out of any desire to protect the insurance companies who give him so much money.

So all we have to do is sit tight and wait for the GOP to trip Nelson’s trigger, and then everything will be okay.