To some, a president Obama is simply unimaginable. From a McCain supporter in Wisconsin yesterday:

"We're all wondering why Obama is where he's at. How he got here. Everybody in this room is stunned we're in this position."

There was always going to be a point of revolt and panic for a core group of Americans who believe that Obama simply cannot be president - because he's black or liberal or young or relatively new. This is that point. As the polls suggest a strong victory, the Hannity-Limbaugh-Steyn-O'Reilly base are going into shock and extreme rage. McCain and Palin have decided to stoke this rage, to foment it, to encourage paranoid notions that somehow Obama is a "secret" terrorist or Islamist or foreigner. These are base emotions in both sense of the word.

But they are also very very dangerous. This is a moment of maximal physical danger for the young Democratic nominee. And McCain is playing with fire. If he really wants to put country first, he will attack Obama on his policies - not on these inflammatory, personal, creepy grounds. This is getting close to the atmosphere stoked by the Israeli far right before the assassination of Rabin.

For God's sake, McCain, stop it. For once in this campaign, put your country first.