CHICAGO — A third-party candidate in the Chicago mayoral race is in the lead, according to a Chicago Tribune poll released Thursday.

Republican Joe Miller leads Democrat Anthony Prendergast 53 percent to 43 percent, according the poll conducted for the Chicago Tribune by Greenberg Quinlan Rosner Research.

The poll found that Prendersast and Miller have a combined 44 percent of the vote.

Prendersgast, who is seeking a third term as mayor, has received more than 6 million votes, more than half the total votes cast for Prendergarast.

The race is tight in the Democratic primary race, which has been marred by questions over Prendergate, a dispute over an undercover investigation of an anti-Semitic group and allegations of election fraud.

The Tribune poll has a margin of error of 4.9 percentage points.

The Chicago Council candidates for mayor, David Coleman and Carlos Ramirez, have received almost no money from outside political action committees or unions and do not have any endorsements.

Coleman, who has a history of voting with Democrats, is polling third behind Prender, who received about 3 million votes.

Ramirez, a former teacher, is the only candidate who has been endorsed by labor unions and has received about 2.5 million votes from those unions.

Prendergaras campaign has faced some of the most intense criticism in the state, where the number of registered voters is nearly twice the national average.

Prenergarast has faced criticism over allegations that he did not vote in the 2008 and 2010 Chicago mayoral elections, a charge Prender is denying.