deblasio New York City mayoral candidate Bill de Blasio (Seth Wenig/AP)

New York City Public Advocate Bill de Blasio continues his ascent in the Democratic primary for New York City mayor, with a new poll out Tuesday showing him sporting a wide lead over the competition and a very real chance of winning without a runoff.

Once a sizable underdog, de Blasio claims the support of 43 percent of those likeliest to vote in the Sept. 10 Democratic primary, according to the Quinnipiac University survey. His closest competitor is former city comptroller Bill Thompson, who clocks in with just 20 percent support. Running a close third is City Council Speaker Christine Quinn at 18 percent. Former congressman Anthony Weiner claims  7 percent.

If de Blasio can eclipse the 40 percent threshold, he will avoid a runoff and win the primary outright. And the numbers are headed in the right direction for him.

In the last Quinnipiac poll, de Blasio was at 36 percent. And a recent Siena College New York Times survey showed him  leading Thompson 32-18 percent.