A new poll finds Bill de Blasio is the new front-runner in the Democratic primary for New York City mayor.

De Blasio, the city's public advocate, is the choice of 30 percent of likely Democratic voters surveyed by Quinnipiac University.

This is the first time de Blasio has topped a poll in this campaign. He surges past former leader Christine Quinn. The City Council speaker is second with 24 percent.

Ex-comptroller Bill Thompson is third at 22 percent. He was the party's 2009 nominee.

Former congressman Anthony Weiner plummets to fourth at 10 percent. He was near the top of every poll until his latest sexting scandal.

The poll surveyed 579 likely Democratic primary voters. It has a margin of error of 4.1 percentage points.