ALEXANDRIA, Va.—Virginia voters approved a constitutional amendment on April 21 that would redraw the commonwealth’s congressional map, giving Democrats an advantage. The Associated Press called the special election for the “Yes” vote at around 8:50 p.m. ET. The vote, as of 10:50 p.m. was 51.4 percent for “Yes” and 48.6 percent for “No,” with 96.6 percent of the votes counted. Voters endorsed a new map drawn by the state’s Democrat-led General Assembly, bypassing a bipartisan redistricting commission. The result is a victory for Democrats who are looking to even the score with Republican states, such as Texas, that redrew their maps to add districts to favor their own party....