Sen. Bernie Sanders: ‘The big secret’ about progressive ideas

Sen. Bernie Sanders joins Ali Velshi to discuss Kamala Harris’ economic plan to lower healthcare costs, and why progressive ideas, such as lowering prescription drug costs and expanding Medicare have been gaining in popularity among Democrats recently. “All progressive ideas are enormously popular,” Sanders tells Velshi. They also discuss the sense of unity at the Democratic National Convention and what Americans can hope to achieve under Kamala Harris’ leadership.