It’s not just McAuliffe vs. Youngkin. The fight is on for control of Virginia’s House.

Alex Askew knows firsthand how tight elections can get for Democrats in Virginia. He barely won his seat in the state House of Delegates, defeating his Republican opponent by just 802 votes in 2019.

That’s why Askew is campaigning furiously ahead of the November election. On the first Sunday of “Souls to the Polls” early voting over the weekend, Askew, 36, attended two church services before an afternoon of campaign events and canvassing. He was joined by a colleague, state Del. Nancy Guy, who clinched her seat by an even...