Kansas

Kansas: Conviction for a felony, misconduct in office, incompetence, or failure to perform duties prescribed by law. No recall submitted to the voters shall be held void because of the insufficiency of the grounds, application, or petition by which the submission was procured. (KS Stat. §25-4301)

I would say incompetence is key here.

Kansas (rules for circulating recall petitions)
All elected public officers in the state except judicial officers (subject to recall)
40% of the votes cast in the last election for the official being recalled (# of signatures required)
90 days (time limit to acquire signatures)

IF enough signatures are obtained and verified, the person being recalled appoints the successor (from the same party as the person being recalled! (rats) and must be selected from a list provided by the committee of the person being recalled.

NOT all states allow for recalls and the rules differ for each state.