Loudoun County Republican sheriff candidate Greg Ahlemann campaigns outside Little River Elementary School in South Riding.

Photo: Tracy A. Woodward, Washington Post

Republican sheriff candidate Greg Ahlemann talks with voters outside Little River Elementary School in South Riding.

Photo: Tracy A. Woodward, Washington Post

Maggie Howland and her neighbor, Caroline Wheatley, 3 1/2 years old, watch as Maggie's ballot is fed into an AccuVote machine at Precinct 107, Little River Elementary School in South Riding.

Photo: Tracy A. Woodward, Washington Post

South Riding resident Maggie Howland marks her ballot with the help of her neighbors, Jack Wheatley, 1 1/2 years old, and Caroline Wheatley, 3 1/2 years old, at Precinct 107, Little River Elementary School in South Riding.

Photo: Tracy A. Woodward, Washington Post

Loudoun County Sheriff Steve Simpson campaigns on Election Day.

Photo: Tracy A. Woodward, Washington Post

Loudoun County Sheriff Steve Simpson waits for voters outside Round Hill Center with supporter Mary Leonard.

Photo: Tracy A. Woodward, Washington Post

Loudoun County Sheriff Steve Simpson talks with voter Roberta Heugh outside Round Hill Center on Election Day.

Photo: Tracy A. Woodward, Washington Post

Edwin IV, 6, and Breanna, 8, wait for dad, Edwin Harmon II, as he votes Tuesday at Precinct 106, Eagle Ridge Middle School.

Photo: Tracy A. Woodward, Washington Post

Voters turn out to cast a vote at Precinct 106, located at Eagle Ridge Middle School in Ashburn.

Photo: Tracy A. Woodward, Washington Post