Mosby is pushing back against Excelsior Springs’ attempt to invalidate its annexation of land west of the city, arguing the motion rests on a mistaken claim about Clay County’s form of government.The lawsuit stems from competing annexation efforts approved by voters in Excelsior Springs and Mosby in November 2025 involving overlapping portions of unincorporated Clay County land west of Excelsior Springs, primarily along Cameron and Rhodus Roads. Because both cities claim authority over portions of the same territory, Missouri law requires a court to determine which municipality, if any, holds legal authority to proceed before the annexations can take effect.In the latest development in the ongoing legal dispute, attorneys for the City of Mosby filed a response asking the court to deny Excelsior Springs’ motion for partial judgment on the pleadings. According to the filing, Excelsior Springs’ argument depends on the premise that Clay County is a charter county, ...