Bernie Sanders promises voters a "political revolution" that will fundamentally remake the American economy and its education and health care systems.
"That's what our campaign is about. It is thinking big," Sanders said during a debate last month in Charleston, South Carolina. "We are going to have a government that works for all of us, and not just big campaign contributors."
Often left unsaid by Sanders, but increasingly at the center of Hillary Clinton's arguments against her rival for the Democratic presidential nomination, is that the political reality of achieving such goals is likely to be a whole lot more complicated.