Updated on: May 8, 2026 / 8:04 PM EDT / CBS News Add CBS News on Google Washington — The Virginia Supreme Court on Friday tossed out a congressional  redistricting referendum passed by Virginia voters last month, striking a blow to Democrats hoping to gain a more favorable map and increase their number of seats in the U.S. House of Representatives.  The decision overturns voters' approval of a new congressional map that would have given Democrats an advantage in 10 House districts, leaving just one safe Republican seat. Although both of Virginia's U.S. senators are Democrats, its House delegation is split with six Democratic representatives and five Republicans.  "We hold that the legislative process employed to advance this proposal violated Article XII, Section 1 of the Constitution of Virginia," the opinion says.…