A top adviser to Sen. Bernie Sanders's (I-Vt.) presidential campaign warned in a memo on Friday that former Vice President Joe Biden could lose the election in November because "a significant portion" of Sanders's supporters are "currently unsupportive and unenthusiastic" about his candidacy.
The memo, written by Jeff Weaver, who recently launched the America's Promise PAC aimed at turning out progressives for Biden, said the presumptive Democratic nominee faces a "clear and dangerous trend" that could block his path to the White House if he does not address his shortcoming with Latinos, working-class voters and young people.