Representative Jack Tanner (Michael Murphy, "Tanner '88," HBO, 1988): The Michigan politician pursued the Democratic presidential nomination.
Pics: Actors who played politicians
Senator William Powers (John Forsythe, "The Powers That Be," NBC, 1992-93): He wasn't a paragon of personal ethics, but professionally, Powers did his best for constituents.
Mayor Randall Winston (Barry Bostwick, "Spin City," ABC, 1996-2002): He came across as a fop at times, but New York's mayor always had his city's best interests at heart.
President Josiah Bartlet (Martin Sheen, "The West Wing," NBC, 1999-2006): Originally designed to stay in the background of the series, Bartlet was the ideal of what many want a president to be.