Maybe the polls are wrong, and John McCain is about to pull off the biggest election upset in American history. But right now the Democrats seem poised both to win the White House and to greatly expand their majorities in both houses of Congress.

Most of the post-election discussion will presumably be about what the Democrats should and will do with their mandate. But let me ask a different question that will also be important for the nation’s future: What will defeat do to the Republicans?

You might think, perhaps hope, that Republicans will engage in some soul-searching, that they’ll ask themselves whether and how they lost touch with the national mainstream. But my prediction is that this won’t happen any time soon.

Instead, the Republican rump, the party that’s left after the election, will be the party that attends Sarah Palin’s rallies, where crowds chant “Vote McCain, not Hussein!” It will be the party of Saxby Chambliss, the senator from Georgia, who, observing large-scale early voting by African-Americans, warns his supporters that “the other folks are voting.” It will be the party that harbors menacing fantasies about Barack Obama’s Marxist  or was that Islamic?  roots.