Warner and Gillespie sparred on taxes, ethics, and other issues during their final debate Monday in Richmond.
Public polls have shown Warner with a comfortable lead over Gillespie, who said he believes the race is tightening in its final weeks.
Warner is a former governor and cellphone pioneer seeking a second term in the Senate. Gillespie is a former lobbyist and adviser to President George W. Bush.
AARP Virginia and The League of Women Voters of Virginia hosted the debate at the studios of WCVE.