Best of the web...

1. Sen. Mel Martinez (R) resigned today, which, at least in theory, gives Gov. Charlie Crist the opportunity to appoint himself to the vacant Senate seat.
2. How can we measure success in Afghanistan?  Peter Feaver says that enemy body counts and American casualty rates arent' reliable indicators.  Is the "rat rate" a more useful metric?
3. Rahm Emanuel cracks the whip on liberal groups attacking Blue Dog Democrats.   But health care reform advocates may not back down.
4. The lighter side of Hillary Clinton's trip to Kenya - dancing included.