sentences:  While serving in the United States Congress, McMillan maintained a house in Charleston, South Carolina at 171 Moultrie St. Today, the house is a contributing structure to the Hampton Park Terrace National Register Historic District and is used as a faculty house for the Citadel.He was elected to the United States House of Representatives to represent the 1st congressional district in 1924 for the Sixty-ninth Congress.He was re-elected six more times and while in Congress was a member of the executive committee of the Inter-Parliamentary Union from 1937 to 1939.