From Jonah Goldberg at NR:
Led by Republican Arlen Specter, the centrists have boldly cut (perhaps temporarily) $100 billion or so from the stimulus package, in the name of fiscal discipline. But, as liberal critics such as New York Times columnist Paul Krugman rightly point out, they’re cutting it to prove their “centrist mojo,” not because they have real concern for public policy. If the bill had started out at $1 trillion, then $900 billion in porcine outlays would be deemed the “responsible” amount to spend.
For certain Beltway centrists, the highest principle is to prove that you are attached to no principle. Rather, your duty is to split the difference between the “ideologues.” If one side says we need a 1,000-foot bridge to span a canyon, and the other side says we don’t need a bridge at all, the centrists will fight for a bridge that goes 500 feet and no farther, then pat themselves on the back.