Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1983 , PeÃ a defeated a 14-year incumbent , William H. McNichols , Jr. to become the first Hispanic Mayor of Denver , a post to which he was re-elected in 1987 .
Simplified: In 1983 , PeÃ a became the first Hispanic Mayor of Denver , and he was re-elected in 1987 .