What will Republicans do now that Scott Brown won?

Glenn Reynolds on the diminished importance of the GOP in Scott Brown's election. Plus notes on the importance of pragmatism and some ideas about the future. He links Captain Ed:

In the wake of an unimaginable political victory in Massachusetts for Republicans, the celebratory mood is understandable. Scott Brown came out of nowhere in a period of three weeks to wrest the crown jewel of Democratic Senate seats from Harry Reid, to deny Barack Obama his supermajority, and to give new energy to a movement that had already managed to stall Obama’s signature legislation for months longer than anyone really expected. Those circumstances have not just launched new energy but also prompted some fantasies that will inevitably come crashing back to Earth. . . . .

We didn’t cross a finish line last night — we crossed the starting line.

Many things can go wrong if the GOP does not handle the Scott Brown win correctly.