De Blasio is the first candidate to nab 30 percent of voters in Quinnipiac’s polling since Weiner entered the race, as a poll from the university released Tuesday shows him leading Quinn by 6 percentage points.

Quinn had led De Blasio by 6 points in a poll conducted July 29.

As Weiner’s numbers have dropped, De Blasio’s have gained the most. A poll released July 24, conducted before new revelations about Weiner’s sexting scandal surfaced, had Weiner leading the pack at 26 percent, and De Blasio in fourth place at 15 percent.

( QUIZ: Do you know Anthony Weiner?)

Tuesday, De Blasio had surged to 30 percent and Weiner was down to 10 percent, in fourth place. Quinn had 22 percent and former Comptroller Bill Thompson was in third, with 22 percent.

De Blasio also led each of his opponents in a potential run-off matchup by at least 9 points.

Quinnipiac also asked voters how much the description “has a strong personal moral character” applies to each candidate. At least 70 percent of voters said it described each the three leaders in the race “somewhat”, “a great deal” or “a good amount”, whereas 68 percent of voters said it describe Weiner “not so much” or “not at all.” That’s up from 55 percent on July 24.

Quinnipiac surveyed 579 likely Democratic primary voters from August 7 to 12 for the poll, which has a margin of error of plus or minus 4.1 percentage points.

The first broadcast debate of Democratic primary candidates is tonight at 7 p.m. ET, and will be available to livestream at politico.com/live.