Republican Bob Dold and Democrat Bill Foster hold leads in their suburban congressional races, newly released polling shows.

We Ask America, an affiliate of the Illinois Manufacturers' Association, had Foster holding a lead over Republican U.S. Rep. Judy Biggert, though that race amounts to a dead heat.

The group's automated poll of 1,303 voters in the 11th Congressional District, taken on Sunday, showed Foster with 50.4 percent of the vote compared to 49.6 percent for Biggert.

The margin of error in the survey was plus or minus 2.7 percentage points.

The group showed women were evenly split at 50 percent between the two candidates, while men slightly favored Foster by a 50-48 percent margin.

Dold, meanwhile, had more daylight between himself and his Democratic rival, Brad Schneider, in the We Ask America poll of 1,257 likely voters.

The group had Dold with 53.6 percent of the vote compared to 46.4 percent for Schneider, with a margin of error of plus or minus 2.8 percentage points.