You are correct you don’t secede you make the other dumb bastard secede. You declare an emergency session of Congress made up of loyal red state senators and representatives and you vote out Cali, NY, NE Illinois. But this is the important part they don’t get to keep the whole states, West New York is ours they get to keep downstate, we keep Illinois they get Chicago. They get SF and LA we keep almost everything else. And if they won’t secede we expulse them. Good riddance!
That's an important point, the breakup should be by county. The seceding states would be like a federation of Singapores or Hong Kongs, not a full country.