HIAWATHA — William Bennett has unseated Hiawatha mayor Tom Theis.Bennett, 53, is owner of A-1 Storage and 5 Seasons Motosports. He has lived in the city 45 years but not held elected office before.He beat Theis by less than 100 votes, winning 53.67 percent of the total ballots.Theis, 72, who first served as mayor in the early 1980s and was a council member and volunteer firefighter for 30 years, was seeking his third consecutive term as Hiawatha’s mayor.“It’s an interesting outcome,” he said.