This app was created by Sharon Machlis with Derek Eder's Searchable Map Template using Google Fusion Tables (and R for data prepartion).
The app is based on idea by Dr. Sam Wang at Princeton Election Consortium to create an app allowing people to enter an address and find nearby competitive Congressional Districts.
Information about competitive districts comes from Cook Political Report ratings of tossup or lean.
Sharon is Executive Editor, Online & Data Analytics at Computerworld, but this project is a personal one on her own time and does not reflect any opinions of her employer.