Both in the US and in Europe, the part of the nation-state that people seem interested in preserving is not the one that has to do with economic security provided by the state. Probably the reason is that the price for it is perceived as being too high.
Instead, people are very clearly and even aggressively signaling that the remnant of the nation-state they want to preserve is the one that offers an opportunity to imagine a shared national identity, morality and culture. The nation-state used to force its subjects into shared identity and Co but now people are choosing that on their own and placing it above all.
The political and administrative units that are going to matter from now on are small. Cities, towns, residential neighborhoods. Local politics matters more than anything. And by local I mean the tinier the better. Global politics is crucial, too. “National” politics is valuable only in terms of its symbolism. People who are comfortable with globalization and fluidity and who aim to belong to exterritorial (or not linked to any territory) elites and people who want to live in pockets of (mainly artificial) solidity will stop communicating at all. Until now, they’ve been trying to open each other’s eyes to the “correct” way of perceiving reality but I’m not seeing many opportunities even for this kind of a stilted dialogue.