Mayoral candidate William Thompson stumped through Brooklyn Saturday morning with fellow Democratic candidates John Liu, who is running for city comptroller, and Bill de Blasio, who is running for public advocate.

They greeted voters and held a "get out the vote" rally in Bedford-Stuyvesant.

Thompson also campaigned with Senator Charles Schumer at the Grand Army Plaza Farmers Market in Prospect Heights, Brooklyn.

A Marist Poll released Friday shows the mayor leading Thompson 53 percent to 38 percent among likely voters, but the Democrat said he thinks the mayor still has cause for concern.

"This is all about turnout and really a question of who comes out and votes," said Thompson. "So I think he's concerned, not just because his votes may stay home, I think he's concerned about the change that people in New York City are indicating all across the city. They'd like to see a new mayor, they'd like to see change in City Hall."

The mayor attended Saturday a "get out the vote" rally in Flushing, Queens and Halloween parades in the Bronx and Queens.