Depends. He seems pretty out of it right now and I don't know how much he would really accomplish. He's also pretty old and unhealthy.
But if he comes back angry and the people around him are effective, then yeah we would start looking for other places to live. I'm not trying to live in a Russian-style handmaid's tale.
I don't think it's dramatic to suggest Trump may actually put an end to our democracy though. Another Lemmy commenter summed it up best. They pointed out that we on the left may have disagreed with McCain or Bush, but we never once feared that they would seize power or leave NATO. We trusted them to at least keep the ship afloat and respect the basic tenants of our free and democratic nation.
With Trump, we don't have that. All bets are off because he's an unhinged narcissist. He would leave NATO and risk the Pax Americana that has stabilized the world for almost 100 years now. And he would do it for money, for negative attention, or just because someone told him he couldn't. America has some pretty major faults but China and Russia are not ready to take the reigns. Say what you will about the West but we at least endeavor to protect human rights. I think anyone who isn't trying to build on the current Western peace is incredibly dangerous in a very scary way.