Complex sentence: He rose to early prominence as a Communications Director for the 1992 U.S. Presidential Campaign of Bill Clinton, subsequently becoming White House Communications Director, then Senior Advisor for Policy and Strategy before departing in December 1996.
Split into simpler sentences: He rose to early prominence as a Communications Director for the 1992 U.S. Presidential Campaign of Bill Clinton and subsequently became White House Communications Director. He was later Senior Advisor for Policy and Strategy before departing in December 1996.