It would be useful to include with such lists random Cities and zip codes within there districts.
If I, for instance in Idaho wanted to email Lamar Alexander, and tell him he just lost my support, I need an address and a zip code to do this...
If you click his website you will find these contact mailing addresses on this link from there. It includes his Tennessee office mailing addresses.
http://www.alexander.senate.gov/public/index.cfm/officelocations
Other Senators probably have the same.
Thanks. Tell him what you think. :)