I'd rather New York and California leave.
What would you do with no silicon valley to drag the rest of the country along?
and the countries biggest financial centers gone.....
How many American owned banks do you think there are within a mile of Wall Street?
All of that is easily moved, and in fact much of it is moving already. Bank of America has been HQ'ed in the south for along time already, and most of the big hedge funds reside in Connecticut, for instance..There is no longer anything special about NYC or California, except the size of their Congressional delegations and the pork windfalls that means for them. They are losing population, and with that loss they're losing seats in Congress.