This polygon layer contains the two elective districts for congressmen in Cambridge in the United State Congress. This layer was created for general use by the Cambridge Election Commission and for public distribution. There are two congressional districts in Cambridge, one of which is in the middle of another one.

For more information and download links see:
http://www.cambridgema.gov/gis/gisdatadictionary/elections/elections_congressionaldistricts.aspx