Complex sentence: Leonard was elected four times to seats in the Ohio General Assembly and then he served as mayor of Dayton, Ohio, from 1982 to 1986, until he was elected Lieutenant governor of Ohio in 1986 on the ticket with Richard F. Celeste.
Split into simpler sentences: Leonard was elected four times to seats in the Ohio General Assembly. After finishing his term as mayor he was elected Lieutenant Governor of Ohio in 1986 on the ticket with Richard F. Celeste.