The nationwide battle for congressional seats shifted dramatically Friday after Virginia’s Supreme Court struck down the state’s Democrat-favored congressional map, even as Republican-led states across the South charge ahead to redraw their own. The Virginia ruling undercuts what Democrats had expected to be a 10-1 advantage in the state’s House delegation. Instead, the map reverts to a narrower 6-5 Democrat edge that was in place before the April special election, giving Republicans a clearer path to compete.  The decision comes on the heels of a U.S. Supreme Court ruling last week striking down requirements for black-majority districts in Southern states, prompting a wave of redistricting efforts in Republican-led states.  Florida and Tennessee have already approved new maps, with more red states likely to follow.  Tennessee lawmakers on Thursday approved a congressional map expected to hand Republicans control of all nine of the Volunteer State’s congressional districts come November. The map, signed by Republican Gov. Bill Lee, spreads out the heavily Democratic population centers in Memphis and Nashville across multiple Republican-favorable districts.  The new map is likely to eliminate Tennessee’s lone Democratic seat, currently held by Rep. Steve Cohen of Memphis.  In Florida, lawmakers led by Republican Gov. Ron DeSantis passed new district lines projected to give Republicans four additional House seats. The changes target Democratic-leaning areas in Tampa, Orlando, and South Florida, aiming to flip those districts to Republican control. Alabama could be next. Lawmakers are considering legislation that would produce a congressional map favoring Republicans 6-1, shifting one seat away from Democrats.  Prior to the Supreme Court decision last week, Alabama was forced to maintain one majority-black district and a second with a near-majority black population under an interpretation of the Voting Rights Act that has now been ruled an unconstitutional racial gerrymander.  Lawmakers in Louisiana, South Carolina, and Mississippi are also reviewing potential redistricting plans that could further shift even more seats to Republicans.  President Donald Trump called on states to redraw maps after the Supreme Court decision last week.  “We cannot allow there to be an Election that is conducted unconstitutionally simply for the ‘convenience’ of State Legislatures,” Trump said Sunday. “If they have to vote twice, so be it. We should demand that State Legislatures do what the Supreme Court says must be done. That is more important than administrative convenience. The byproduct is that the Republicans will receive more than 20 House Seats in the upcoming Midterms.”