Claim: Dennis served as Speaker of the United States House of Representatives.
Evidence: John Dennis Hastert -LRB- -LSB- ˈhæstərt -RSB- born January 2 , 1942 -RRB- is an American former congressman who served as the 51st Speaker of the United States House of Representatives from 1999 to 2007 , representing from 1987 to 2007.