Owing to Sullivan's personal popularity, he won re-election over Mead in a landslide, marking the fifth straight Democratic victory in Wyoming's gubernatorial races, a streak that has yet to be broken by either party.

[2] Won Lost Withdrew Declined Speculated The central committee of the Wyoming Republican Party interviewed Hugh Duncan, Jack Sidi, Charles Scott, and Carroll Miller and scored them as possible gubernatorial nominees.

[6] Duncan withdrew from the election on March 2, 1990, stating that he was unable to convince people of the differences between him and Sullivan.

[17] Nyla Murphy, a member of the state house who lost her committee leadership positions due to policy disagreement with Republican leaders, announced that she would run for one of five statewide offices in Wyoming.

[20] State legislators Notable individuals Sullivan recorded a message for a test of Wyoming's Emergency Broadcast System, but it was replaced as some radio stations would not air it due to the equal-time rule.

[22] The National Organization for Women declined to endorse either of the candidates and instead supported a write-in candidacy for Murphy.