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SPRINGFIELD, Va. (WUSA9) -- Congressman Frank Wolf was in Springfield just a few hours before his bombshell announcement that he would not seek reelection.

Wednesday, he told WUSA9 that his decision has nothing to do with the government shutdown, which he voted against. Wolf says he wants to devote his time to his work on human rights. Despite Virginia's move toward Blue, with its two senators and governor elect who are all Democrats, Republican party leaders vow to keep the 10th District seat Red.

Fairfax GOP Chair Jay McConville says, "He has been a great mentor to a lot of leaders in the 10th District. Now I don't know who our nominee is going to be but we're going to have a great one and we're going to hold that seat."

But for the first time, the Democrats have a formidable candidate in Fairfax County Dranesville Supervisor John Foust, who represents McLean, Great Falls, Vienna, and Herndon and parts of Falls Church.

"I think I have demonstrated that I can work across the aisle and I think that's what's needed in Washington," says Foust.

Foust says it was the government shutdown pushed him to run for the Congress.

"I was so disappointed with Congress when that happened. It just was like 'come on, guys, and gals, grow up,'" says Foust.

The 10th District spans a huge area from a sliver in Arlington County through Fairfax County, Loudoun County and all the way to the West Virginia line. Many of those people are represented by State Senator Dick Black.

Black lives in Ashburn and plans to run for the congressional seat. Black also served in the House of Delegates and is a former Marine. He was wounded 10 minutes after a photo was taken in Vietnam. He showed us thatphoto.

Black says theMarine training gives him the drive to move forward and hesays he is determined to win the GOP nomination.

"I am what I am. I am pro-life, I am pro-gun, I am pro-free enterprise, these things are not going to change," saysBlack.

He also supports traditional marriage, and says he'll vote the way he believes. Though he wasn't in favor of the shutdown, he praises those who tried to defund Obamacare and wants to continue on that course.

Black is not an official candidate yet, but he has taken the first step and formed an exploratory committee.

Virginia's 10th District includes much of Northern Virginia. It has been gerrymandered to favor Republican candidates, but it has been split down the middle the last few elections. Republican Ken Cuccinelli won the district by only percent in November's gubernatorial race. Republican Mitt Romney also barely won the district by one percent in the 2012 Presidential race. Also in 2012, Democratic Senator Tim Kaine won the district with 51 percent of the vote. President Obama won the district in 2008, also with 51 percent of the vote.

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