A Quinnipiac University national poll last week showed Warren winning 19 percent of the African-American vote — a nine-point jump over the poll’s August results. In the latest Morning Consult poll, released Wednesday, she’s up by five percentage points with black voters since August.

Those advances have played a role in her surging overall numbers, which have seen Warren expand her lead over the African-American candidates in the primary — Sens. Kamala Harris and Cory Booker — and even overtake Joe Biden and Sen. Bernie Sanders in some state and national polls.

“It’s certainly a dramatic shift that had to be noticed by the Biden campaign — and also Sanders, Harris and Buttigieg,” said Tim Malloy, Qunnipiac’s polling analyst. “Other [candidates] aren’t moving. And if they are, it’s in the wrong direction.”