Today's most important issue: Why won't Obama smile?

Now that -- perhaps -- the Jeremiah Wright kerfuffle is dying down somewhat, I think I've spotted the GOP's next line of attack on Barack Obama: He doesn't smile.

No, really. Valuing my mental health more than my political junkiness, I tend to skip the Sunday morning shows, figuring that anything important will filter into the blogosphere pretty quickly. And according to Commentary's Contentions, apparently, is the big news from Obama's appearance on "Meet the Press" this morning.

Obama's been talking for half an hour now and has not smiled once. Not once.

Well, OK, random observation. Surely not the kind of thing you'd blow up into something having real meaning--

In a primary race where the differences between the two candidates are sometimes hard to discern, there were two vivid ones on display Sunday morning as Barack Obama did Meet the Press and Hillary Clinton did This Week in a town hall setting in Indiana. The first is temperamental. As she was with Bill O’Reilly, Clinton was funny, cracking jokes (this time about Rush Limbaugh), and looking and sounding like she is having fun. Barack Obama, as John points out, was dour, humorless, and emotionally remote. She was supposedly the one with the harsh and cold personality when this campaign started. Somewhere along the way things changed.

Apparently the funnybone is the new Wright. My prediction: Tomorrow's Bill Kristol column in the New York Times will focus on how Obama's humorlessness is proof that he is out of touch with real Americans.