Republican presidential candidate Mitt Romney speaks during a campaign rally at Capital University on Wednesday. The former Massachusetts governor has been endorsed by many of Virginia’s top GOP leaders. (Justin Sullivan/GETTY IMAGES)

“Mitt Romney is a leader who has proved numerous times that he can be counted on to turn troubled organizations around, whether it was in business, the Winter Olympics, or as governor of Massachusetts,’’ Davis said in a statement. “That is why I urge all those who want to fight for the America we love to join me in standing with Mitt.”

Romney has already received the backing of many of Virginia’s top Republican leaders, including Gov. Bob McDonnell, Lt. Gov. Bill Bolling and former governor Jim Gilmore.

Davis, a moderate Republican who once led the Fairfax County Board of Supervisors, served more than a dozen years in Congress, where he was chairman of the House Committee on Government Reform.

“I’m honored to earn Tom’s support,” Romney said. “Tom has been a leader in our party for many years and is a tireless advocate of responsibility in government. I look forward to his counsel in the weeks and months to come to help get Virginians back to work and our country back on track.”

Romney announced a leadership team in Virginia, led by Bolling.

Only Romney and Rep. Ron Paul (Tex.) will appear on the Virginia primary ballot Tuesday.

Other Republicans have stayed out of the race: Former governor and senator George Allen, who is running for U.S. Senate, has said he won’t endorse in the presidential race. Attorney General Ken Cuccinelli has stayed silent on his potential endorsement.