Complex sentence: He managed Charleta B. Tavares' unsuccessful campaign for Ohio Secretary of State in 1998, and was Chief of Staff for the Minority Caucus of the Ohio House of Representatives from January 1999 to September 2000.
Split into simpler sentences: He managed Charleta B. Tavares' unsuccessful campaign for Ohio Secretary of State 1998. He was Chief of Staff for the minority caucus of the Ohio House of Representatives from January 1999 to September 2000.