Modern DemocratsAmerica turned 250 this summer and moderate Democrats have little to cheer about. The present Democratic Party is no longer the party of former Presidents Franklin D. Roosevelt or John F. Kennedy. It is dominated by socialists who oppose the principles that have made America great. New York City has a democratic socialist mayor. Three of his comrades recently won Democratic primaries in New York congressional races. A democratic socialist recently won the Democratic primary for mayor of Washington, D.C. Seattle has a democratic socialist mayor whose anti-business policies have led Starbucks to move some operations to Tennessee. Exxon...