Harris’s attempt to replicate her feat in the second debate backfired among Democrats who say she went too negative on Biden. The Californian also suffers from a perception that she lacks a deep ideological well to guide her policy ideas, in contrast to her three main rivals who are better-defined. And her past as a prosecutor has earned her supporters and detractors…

For Harris, the danger is that she’s another Marco Rubio. The Florida senator, too, had a potentially history-making candidacy during the Republican nomination battle in 2016 and was hailed by the party establishment as presidential timber, before he failed to translate that on the ground…

“Too flippy-floppy. I just don’t like her,” said Debby Fisher of Richmond, California — near Harris’s hometown of Oakland — who plans to support Sanders.

Suzanne Cowan of San Francisco said she soured on Harris after her change on health care.

“That’s not my kind of candidate. Either you know what issues you support and you have the courage to stand up for them or you don’t,” she said. “For me she’s ‘I’ll be in favor of whatever is trending’ — and that doesn’t cut it.”