The four vacancies were , to be filled at the same time as the general election with the winner taking office in November immediately after the votes were certified; , with a separate special election on the same day; and and , which did not have special elections to fill the vacancies before January 2007. had been held by Democrat Bob Menendez, Texas's 22nd congressional district had been held by Republican Tom DeLay, Ohio's 18th congressional district had been held by Republican Robert Ney, and Florida's 16th congressional district had been held by Republican Mark Foley.