When a Senate seat becomes vacant due to death, resignation, or expulsion, the Seventeenth Amendment allows state legislatures to authorize the governor to appoint a temporary replacement until a special election occurs. Currently, 46 states grant governors appointment authority, while Kentucky, North Dakota, Oregon, Rhode Island, and Wisconsin require special elections only. Among states allowing appointments, 11 restrict the governor''s choice: Hawaii, Maryland, Montana, North Carolina, West Virginia, and Wyoming require governors to select from three nominees submitted by the departing senator''s party. In 31 states, special Senate elections coincide with regular general elections, though timing varies based on when the vacancy occurs. The amendment, ratified in 1913, shifted Senate selection from state legislatures to direct popular vote while creating this vacancy mechanism. Some appointments have proven controversial, with governors accused of selecting loyalists or using vacancies for political advantage.