Seemingly spent on all their absurd arguments about the substance of health-care reform (death panels! socialism!), Republicans have now moved on to making absurd arguments about the process of health-care reform, namely that circumventing the filibuster is like spitting on James Madison's grave (just to clarify, the filibuster is not in the Constitution). But when you listen to them talk, you quickly notice that they never make a real, substantive argument in favor of the filibuster. Indeed, the word "filibuster" doesn't pass their lips too often.
During the health-care summit, both Obama and Biden tried to make the point that both Republicans and Democrats agree that there should be some government regulation of health care; they're just disagreeing about exactly how much. As they observed, GOP members of Congress have signed on to certain kinds of regulation (the popular kinds), like ending recissions (where your insurance company kicks you off your policy when you get sick) and even outlawing denials for pre-existing conditions, which is a large change with serious implications.
At today's Health Care Smackdown ("You'll pay for the whole seat -- but you'll only need the edge!") and in the postmortems, both sides will likely charge that the other side is being dishonest about their intentions. Democrats will say that Republicans are pretending that they are open to reform, but all they really want is to kill the bill, for reasons both substantive (they don't particularly think health care should be reformed) and political (they don't wantDemocrats to get a victory). For their part, Republicans will charge that Democrats pretend they are open to bipartisanship, but in truth they just want to pass their bill, and they don't care whether Republicans come along or not.