Sen. Bernie Sanders, the improbable current front-runner for the Democratic presidential nomination, is lying to the American people when he tell us that "democratic socialism" simply means he wants to give the vast majority of Americans new opportunities to succeed and wants millionaires and billionaires to pay their fair share of taxes. In fact, my extensive research on comments Sanders has made going back decades shows he has warmly embraced not just socialism but communism, and praised tyrannical dictatorships that have trashed the freedoms Americans enjoy under the Bill of Rights that are part of our Constitution. Sanders is not just another liberal Democrat who wants to expand social programs, in the tradition of Presidents Franklin Roosevelt and Lyndon Johnson. He is the most radical candidate in American history with a real shot at winning the presidential nomination of one of our two major political parties. While candidates have run for president in the past on radical platforms under the banners of socialist, communist and other fringe political parties, they have drawn only tiny percentages of the vote.