Voter Registration Lists (In the U.S., limited to California, Louisiana, Missouri, Ohio and Tennessee; some also exist for Canada and Great Britain.) See Cyndi's List Voters, Poll Books, Electoral Records. Some are available at Ancestry.com (paid subscription). And see if any are on the U.S. Gen Web site for the locality of interest.
Congressional Biographical Directory can be searched online by any of several criteria. And biographies of federal judges can also be found online, as can information on governors.
The Political Graveyard tries to locate the burial places of elected officials.