Complex sentence: In January 1991, Diehl was named legislative director to U.S. Senator Lloyd Bentsen, and in September 1992 the Senator promoted him to majority staff director of the Senate Finance Committee.
Split into simpler sentences: In January 1991, Diehl was named legislative director to U.S. Senator Lloyd Bentsen. In September 1992, the Senator promoted him to majority staff director of the Senate Finance Committee.