Do you think the north will ever leave the US

I was watching TV and it was talking about the cultural and economic differences between states that vote Democrat and Republican, which got me thinking about will one day the states that vote Democrat, and the states that resemble them( Iowa, Ohio, and possiby Indiana) leave the Union. If they do what do you think will happen and where would the capital be, Chicago, NYC, LA, Washington DC, or some other city? And how would the south react to the norths succession?>