Editor's Note: In the final 100 days before Election Day, CNN has been profiling one race at random each day from among the nation's top 100 House races, which we've dubbed "The CNN 100." Read the full list here.
Today's featured district is:
Pennsylvania's 3rd- Democrat Kathy Dahlkemper is defending her seat.
Primary: May 18, 2010
Where: The 3rd Congressional District is located in northwestern Pennsylvania
Days Until Election Day: 2
(CNN)- Freshman Democratic Rep. Kathy Dahlkemper, a small business owner, is facing a tough re-election battle for her swing district seat.