Updated 1:30 p.m. | Freshman Rep. Robert Dold (R) and businessman Brad Schneider (D) are in a dead heat in the race for an Illinois House seat, according to a new Democratic poll released today.

Dold and Schneider each received 46 percent in the survey conducted for the Service Employees International Union and House Majority PAC, a Democratic super PAC.

The 10th district presents Democrats with one of their best pick-up opportunities this fall. Currently, Dold represents the most Democratic district held by a GOP House Member. What’s more, Democrats improved the 10th for their party in their redraw of the state’s Congressional map last year. Roll Call rates the race as Leans Democratic.

Democrats argue the poll is further evidence Dold is in trouble going into November.

“Bob Dold is in serious trouble because he is seriously out of step with Illinois,” said Alixandria Lapp, executive director of House Majority PAC.

In May, Schneider’s campaign released its own poll that showed him tied with Dold at 39 percent. Since that time, campaign television advertisements have bombarded the 10th district — and there are more to come in the next few months.

The Democratic Congressional Campaign Committee has reserved around $3 million in the Chicago media market for three House races, including Dold’s district. House Majority PAC and the SEIU have reserved about $2.4 million in Chicago television for fall races as well.

The Greenberg Quinlan Rosner Research survey gauged the opinion of 400 likely voters in the 10th district Aug. 8-12. It had a margin of error of 4.9 points.

See the full polling memo below:

[scribd id=103048451 key=key-1fewetjt9g2hbjl7x3x2 mode=scroll]

Update 1:30 p.m.: Two Democratic sources point out that Republicans have already spent heavily in the district to boost Dold, meanwhile Democrats have not aired any spots since the primary. The Chamber of Commerce and New Prosperity Foundation have targeted the race in recent weeks.

Additionally, the Congressman’s campaign announced it reserved $1.88 million in additional airtime in the Chicago market this October and November. Dold’s campaign went up on the airwaves last week with this spot:

https://www.youtube.com/watch?v=1gG4RuPTrn4.