Walter Russell Mead is the Ravenel B. Curry III Distinguished Fellow in Strategy and Statesmanship at Hudson Institute, the James Clarke Chace Professor of Foreign Affairs and Humanities at Bard College, and the Global View Columnist at The Wall Street Journal. From 1997 to 2010, Mr. Mead was a fellow at the Council on Foreign Relations, serving as the Henry A. Kissinger Senior Fellow for U.S. Foreign Policy from 2003 until his departure. American politics are growing increasingly agitated, and rising anger is affecting the business of government too.