Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at his campaign headquarters, Wednesday, March 4, 2020, in Burlington, Vt. (AP Photo/Wilson Ring)
March 6, 2020
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March 6, 2020 1:06 a.m.
Sanders struggles to expand supporter base after Warren exit
WASHINGTON (AP) — It took Joe Biden's moderate rivals just hours to unite behind his presidential campaign after they left the race. Bernie Sanders hasn't been so fortunate.