Another Virginia Democrat is dropping out of his party's veep-stakes.

Freshman U.S. Sen. Jim Webb, in a statement just released by his office, said he's told presidential nominee in-waiting Barack Obama, "Under no circumstances will I be a candidate for vice president."

Former Gov. Mark R. Warner, now running for the Senate seat of retiring Republican John Warner, also has ruled out a vice-presidential bid this year.

Webb was narrowly elected to the Senate in 2006 over Republican incumbent George Allen, himself a presumed presidential candidate at the time.

Webb says he's staying in the Senate to focus on an agenda of strengthened national security, economic fairness and increased government accountability.

"I have worked hard to deliver upon that commitment, and I am convinced that my efforts and talents toward those ends are best served in the Senate," said Webb, who's just won new education and training benefits for G.I.'s.

Among the reasons Webb had been mentioned as a running mate for Obama: a background in military matters that includes heroism as a Marine in Vietnam and a stint as Navy secretary under President Reagan.

Webb, who was neutral during the protracted Democratic nomination fight between Obama and Hillary Clinton -- both of whom campaigned for him two years ago -- is affirming his support for Obama. Said Webb, "I will proudly campaign for him."

-- Jeff E. Schapiro