Time managing editor Rick Stengel (pictured above) is leaving journalism to go work for the State Department, making him at least the 15th 21st reporter to go to work for the Obama administration. Stengel will be the Under Secretary of State for Public Diplomacy and Public Affairs, Politico and Capital New York report. The last high-profile journalist to leave Time for the Obama administration is Jay Carney, who is currently White House press secretary (pictured at right). Update: Thanks to a few tipsters, we've updated with a bigger count. They're listed below. A wave of reporters went to work for...