A top progressive pundit says mainstream Democrats are worried about Bernie Sanders winning the White House in 2020 

"Bernie right now has a better chance of winning than rest of field combined," said Cenk Uygur, founder of progressive news network TYT and host of "The Young Turks," who supported Sanders in 2016. Uygur has not decided whom he will back in 2020, but says he likes Sanders and Sen. Elizabeth Warren, D-Mass.



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