The 2008 United States Senate election in Virginia was held on November 4, 2008. Incumbent Republican U.S. Senator John Warner decided to retire instead of seeking a sixth term. Democrat Mark Warner (no relation) won the open seat by more than 31 percentage points. Warner became the first Democrat to win this seat since 1966. This was also the first time since 1964 that the state voted simultaneously for a Democratic presidential candidate and a Democratic Senate candidate, having voted for Barack Obama in the presidential election, albeit by a far lesser margin. This was Virginia's first open-seat election since 1988.