From what I read, the decision could come out in June 2026 and that would be enough time for them to redraw the maps.
Every state is not the same. Some have filing deadlines where they would have to put the new maps in place so far before the election. And even if they did redraw people still have to vote. Texas already tried to redistrict in 2018 and two of their seats got flipped to blue. Kansas and Nebraska really don’t want to do it, because their races are so thin
California, New York, Illinois, etc would have to be a one take all leaving no republican seats. Just because they could potentially get 19, doesn’t mean they’re automatically going to get 19.
His base doesn’t vote in the midterms, everyone needs to go vote