Question: Barry K. Sullivan's predecessor, Harroun, was appointed by which former American congressman who served as the 51st Speaker of the United States House of Representatives from 1999 to 2007?
Sentence (from "Dennis Hastert"): John Dennis Hastert ( ; born January 2, 1942) is a former American congressman who served as the 51st Speaker of the United States House of Representatives from 1999 to 2007, representing Illinois 's 14 congressional district from 1987 to 2007.
Relevant evidence: Yes