Rep. Mark Kirk (R) and state Treasurer Alexi Giannoulias (D) lead their opponents heading in to the Feb. 2 Senate primary.

Public Policy Polling, in an automated telephone survey conducted Jan. 22-25, found that Giannoulias has the support of 32 percent of Democratic primary voters. Giannoulias polled at 34 percent in a survey released Sunday by the Chicago Tribune and WGN.

Former Chicago Inspector General David Hoffman (D) scored 20 percent in the PPP poll, while former Chicago Urban League President Cheryle Robinson Jackson is polling at 18 percent. About 27 percent of the PPP poll’s 400 likely Democratic voters characterized themselves as undecided.

Hoffman and Jackson polled at 16 percent and 19 percent, respectively, in the Tribune’s survey of 601 likely Democratic primary voters.

On the Republican side, the Tribune poll found Kirk leading the field as the favorite of 47 percent of those polled, but with a third of likely primary voters still trying to make up their minds.

In the PPP poll, Kirk was the choice of 42 percent, and 39 percent of the 573 likely primary voters surveyed were undecided.

Kirk’s chief GOP primary competition, real estate developer Patrick Hughes, had 9 percent support in the PPP poll and 8 percent in the Tribune’s poll, which had an error margin of 4 points.