Coming so close in the insurance commissioner's race, Williamson tried once again in politics: he contested the mayoralty of Shreveport in 1982 in an effort to succeed one-term Mayor William T. "Bill" Hanna, a fellow Democrat and, like Williamson's father, an automobile dealer, but Ford, rather than Chevrolet.
In 1986, Williamson challenged Hussey again but did not run actively.