Civil rights groups sue Tennessee over the state's GOP-drawn congressional and state Senate maps, calling the boundaries 'unconstitutional racial gerrymandering'

• Civil rights and voting rights groups have sued Tennessee over the state's congressional map.
• The suit alleges the map dilutes minority voting strength and that it's "unconstitutional."
• The GOP-drawn map led to the elimination of a heavily blue district in one of the state's Democratic centers.

A group of civil rights and voting rights organizations last Wednesday filed a lawsuit against Tennessee Republican Gov. Bill Lee and several top election officials over the state's congressional and state Senate maps, arguing that the boundaries are unconstitutional and violate the rights of minority voters.