Democratic presidential candidate Sen. Kamala Harris (Calif.) speaks while former Vice President Joe Biden and Sen. Cory Booker (N.J.) listen during the Democratic Presidential Debate at the Fox Theatre on July 31 in Detroit. New Morning Consult polling shows this week’s debates did little to immediately impact Democratic voters’ preferences for president. (Scott Olson/Getty Images).

Standing in contrast to the first set of Democratic debates, this week’s matchups did little to immediately impact potential Democratic primary voters’ preferences for president. Thirty-two percent of Democratic primary voters said they still want to see former Vice President Joe Biden at the top of the party’s 2020 ticket, according to new Morning Consult polling conducted after the Tuesday and Wednesday debates in Detroit. That figure hasn’t shifted much since the end of the first round of debates, when 33 percent said Biden was their first choice.

No candidate saw movement outside the survey’s margin of error of 2 percentage points. The Aug. 1 poll was conducted among 2,419 registered voters who indicated they may vote in the Democratic primary or caucus in their state. The latest debates did not move the needle like the Miami debates in June, which saw Sen. Kamala Harris (D-Calif.) double her vote share in the immediate aftermath, moving from 6 percent of the vote to 12 percent, and Biden’s support dropping 5 percentage points. Both debates this week brought similar dynamics as the first round, with lesser-known candidates aiming their fire on the stage’s front-runners. On Tuesday, Sens. Bernie Sanders (I-Vt.) and Elizabeth Warren (D-Mass.) faced criticism over their ideology from their more moderate peers, while the second night saw Biden and Harris criticized over their records.

While pundits applauded Warren for her performance in night one of CNN’s two-night debate — both for zinging former Rep. John Delaney (Md.) and spotlighting policy issues such as health care — her and Sanders’ more progressive policy stances were targets for their more centrist counterparts. Candidates used Wednesday to attack front-runner Biden over his criminal justice record and the Obama administration’s deportation record, but their attempts to discredit the former vice president were largely unfruitful in terms of changing voters’ minds — at least in the short term. Rep. Tulsi Gabbard (Hawaii) also used the stage to criticize Harris’ record as attorney general of California.