District 10 has been represented by Barbara Comstock (Republican) since Jan 6, 2015

Comstock's official website | @RepComstock | Washington, D.C. Office Phone: 202-225-5136

Barbara Comstock's 3-point strategy: Avoid hard issues, appear to be a moderate, raise a huge campaign war chest.
(From an excellent post on MentalNoteSite) Comstock, a two-term congresswoman and former Republican National Committee opposition research gururaised $5.25 million in 2016, the ninth-most of any House candidate, according to OpenSecrets.org.

Her Republican Primary Challenger is Shak Hill

Democratic Challengers in 2018

 

Julia Biggins

Scientist. Lives in Manassas.
1,970 Twitter followers.
$67,564*

Alison Kiehl Friedman

Nonprofit activist against and former State Department official. Lives in McLean
1,003 Twitter followers.
Raised $1,064,398*

Dave Hanson

Navy captain veteran and intelligence officer
SUSPENDED CAMPAIGN AS OF FEB. 5th, 2018

Dan Helmer

Army captain veteran. Lives in Fairfax
1,727 Twitter followers.
Raised $688,329*

Paul Pelltier

Former Federal prosecutor. Lives in McLean
No Twitter Account or Facebook Page. $207,044

Deep Sran

Education technology entrepreneur. Lives in Ashburn
358 Twitter followers.
Raised $239,902*

Lindsey Davis Stover

Former chief of staff for a congressman. Lives in McLean
20.5K Twitter followers.
Raised $620,423*

Jennifer Wexton

Current Virginia State Senator. Lives in Leesburg
4,107 Twitter followers.
Raised $660,517*

Google Map District 10 *FEC.GOV as of Feb. 11 2018

2016 ELECTION HISTORY

Margin of win in 2016 Barbara Comstock against Luann Bennett
Votes: 210,791 (52.69%) Margin: 23,079 (+5.77%)
Incumbent Barbara Comstock was a member of the NRCC's Patriot Program. The program is designed to help raise money and assist vulnerable incumbents seeking re-election.[11] LuAnn Bennett was one of the initial members of the Democratic Congressional Campaign Committee's Red to Blue Program. The program "highlights top Democratic campaigns across the country, and offers them financial, communications, grassroots, and strategic support."[12] Ballotpedia 

2014 Election History

According to Roll Call, the Democratic Congressional Campaign Committee planned to spend $2.8 million in support of John Foust's campaign, but instead they spent the money in California's 7th Congressional District instead. The convention to pick a candidate was cancelled that year because no one else entered the race besides Foust.