In this May 6, 2015, photo, Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks during a news conference on Capitol Hill in Washington, Wednesday, May 6, 2015. Once a democratic socialist, always a democratic socialist. Once a scold of big money in politics, still a scold. No one can accuse Sanders of flip-flopping over his four decades in public life. Rock steady, he’s inhabited the same ideological corner from which he now takes on Hillary Rodham Clinton in an improbable quest for the Democratic presidential nomination. (AP Photo/Evan Vucci)