Marine veteran David Williams running for Senate in Virginia Republican David Williams hopes to unseat Mark Warner next year, featuring Zohran Mamdani in his campaign ad as an example of the left. (Courtesy: David Williams for Senate) NEW You can now listen to Fox News articles! A retired combat Marine and State Department national security expert jumped into the political fray Tuesday, announcing a bid to unseat Sen. Mark Warner, D-Va., by invoking New York City Mayoral-elect Zohran Mamdani in