NEW YORK - Council Speaker Christine Quinn slipped to third place in the New York City mayoral race, behind Public Advocate Bill de Blasio and former Comptroller Bill Thompson close behind, according to amNewYork-News 12 poll results released last Thursday.

De Blasio is ahead in the Democratic camp with 29 percent, followed by Bill Thompson with 24 percent and Quinn with 17 percent. Former Rep. Anthony Weiner follows with 10 percent and city Comptroller Johh Liu is the choice for 5 percent of those polled.

De Blasio leads the vote intention for white voters and Brooklyn residents, and is tied with Thompson with Bronx residents, with 28 percent each. A majority of African-Americans expressed their preference for Thompson over De Blasio, 35 to 29 percent.

In the Republican primary, former MTA chief Joe Lhota has a commanding lead over businessman John Catsimatidis, the same poll revealed.

In the GOP field, Lhota leads Catsimatidis 50 to 28 percent and is ahead in all major demographic and geographic categories of the poll.

This survey of 1,403 New York City adults was conducted Aug. 12 through Aug. 14, 2013. Adults 18 years of age and older residing in New York City were interviewed by telephone. Telephone numbers were selected based upon a list of telephone exchanges from throughout the city. The exchanges were selected to ensure that each borough was represented in proportion to its population. To increase coverage, this landline sample was supplemented by respondents reached through random dialing of cellphone numbers. The samples were then combined and balanced to reflect the 2010 Census results for age, gender, income, race and borough. Interviews were conducted in both English and Spanish. Results for adults are statistically significant within ±2.6 percentage points. There are 1,105 registered voters. Results for this subset are statistically significant within ±2.9 percentage points. There are 679 Democrats and 132 Republicans. The results for these subsets are statistically significant within ±3.8 percentage points for Democrats and ±8.5 percentage points for Republicans. There are 355 likely Democratic voters defined by a probability turnout model. This model determines the likelihood respondents will vote in the 2013 Democratic Primary for mayor based upon their chance of vote, interest in the election, and past primary participation. The results for this subset are statistically significant within ±5.2 percentage points. The error margin increases for cross-tabulations.

The primary election will take place on Tuesday, Sept. 10.