sentences:  Members elected to county government positions are required to declare a party affiliation and to be residents of the county.Boone County is part of Indiana's 4th and 5th congressional districts, Indiana Senate districts 21 and 23, and Indiana House of Representatives districts 28, 38 and 87.Prior to 1940, Boone County was a Democratic-leaning swing county in presidential elections, backing the national winner in every election from 1912 to 1936.