 She worked as a mortgage company manager and supervisor, as the director of the Milwaukee Coalition Against Drug and Alcohol Abuse and as the executive director of the Midtown Neighborhood Association, before being elected to the Wisconsin Assembly's 11th district in 1992.Morris-Tatum was re-elected for four terms, but in 2004 chose to run for the 4th Wisconsin State Senate District seat (being vacated by Gwen Moore), running unsuccessfully against State Representative Lena Taylor (the winner) and Milwaukee County Supervisor James G. White in the Democratic primary.Her successor is Jason Fields.