Complex sentence: In 1984, Bailey, after yet another contested primary, became the Democratic nominee for Pennsylvania Auditor General that year; he handily won the General Election; he was the "only" Democratic nominee to win statewide that year.
Split into simpler sentences: In 1984, Bailey won the Democratic nomination for Pennsylvania Auditor General in a hotly contested primary; he handily won the General Election. He was the "only" Democratic nominee to win statewide that year.