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Bernie Sanders to nab one of his biggest endorsements yet

The 700-member-strong Communications Workers of America union is set to back Sanders Thursday.

Democratic presidential candidate Sen. Bernie Sanders (I-VT) and philosopher Cornel West (R) embrace at a watch party for the second Democratic presidential debate Nov. 14, 2015 in Des Moines, Iowa. (Photo by Alex Wong/Getty)
Democratic presidential candidate Sen. Bernie Sanders (I-VT) and philosopher Cornel West (R) embrace at a watch party for the second Democratic presidential debate Nov. 14, 2015 in Des Moines, Iowa.Getty Images

Andrea Mitchell

Andrea Mitchell is chief Washington correspondent and chief foreign affairs correspondent for NBC News.

Alex Seitz-Wald