Many political insiders believe Bernie Sanders is preparing for another presidential run in 2020, and his supporters are very excited about it. Skeptics say at age 79, the Vermont senator will be too old for the job. Plus Hillary Clinton beat him in the primary by nearly four million votes, and he'll never win the Democratic nomination without support from voters of color. But others think he has the best chance going up against President Trump. What do you think? 👴🏻