There is no peaceful going... it will be bloody.
Consider the logistics... every red state has a sizeable minority blue minority, every blue state has a sizeable red minority. There will be nothing unanimous about any secession. Then, consider how to handle the apportionment of assets and liabilities. If Texas secedes, what happens to the federal checks going into Texan retirees? What about a good portion of the working population with companies that span state lines?
Seems to me a mess, and the result will be a great deal of flames.... and then burning embers... rivers of blood...
And lets not forget our troops. They’re from every state and based all over the world.