A Virginia gubernatorial poll released Wednesday shows Republican Glenn Youngkin leading Democrat Terry McAuliffe with likely voters for the first time, a sign that President Biden’s tanking approval ratings may have become a drag on Democrats. The University of Mary Washington poll conducted Sept. 7-13 found the Republican businessman ahead of Mr. McAuliffe, the state’s former governor, by 48% to 43% with likely voters in a blue-trending state that Mr. Biden carried in 2020 by 10 percentage points. The down-ticket Republican candidates for lieutenant governor and attorney general also held narrow leads over their Democratic competitors ahead of the Nov....