CHICAGO (CBS) — A former Democratic Congressman running to get his old job back is critical of the way he says bipartisan cooperation is falling out of favor on Capitol Hill.

As WBBM Newsradio Political Editor Craig Dellimore reports, Democrat Bill Foster, who has worked professionally as a scientist, is trying to unseat U.S. Rep. Judy Biggert (R-Ill.)

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Both of them have occasionally voted with the opposite party, but Foster agrees so-called moderates are feeling a lot more pressure to be partisan on Capitol Hill these days.

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“I’ve heard getting elected to Congress compared to being sent to prison, where you have to join one gang or another in order to survive, which has, unfortunately, too big an element of truth in it,” Foster said. “But I think the key thing there is to maintain a fact-based debate, and this is the thing that I’ve found the biggest change in going from scientists into politics.”

Foster is the guest on WBBM Newsradio’s “At Issue” program this weekend. You can hear more of his comments at 9:30 a.m. and 9:30 p.m.

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LISTEN: WBBM Newsradio Political Editor Craig Dellimore reports