There's profound skepticism in Congress about Sanders' ability to get his agenda passed. Two-thirds of Democrats in the Senate have not signed on to Medicare for All, which would cost an estimated $30 trillion to $40 trillion over ten years. And that's just one of Bernie Sanders' many proposals. There's also free public college, cancellation of all student debt, a federal job guarantee, and a Green New Deal to rapidly reduce carbon emissions. Anderson Cooper: How much will that cost? Bernie Sanders: Obviously, those are expensive propositions, but we have done our best on issue after issue-- in paying for...