Is the US a lost cause?

Pretty much what the title says. Half the country decided to elect a convicted felon who outright promised to seek revenge and destroy the country against a perfectly qualified, cheerful black woman. I feel like even if there are any future elections, there's no coming back from that. This is to say nothing of other countries, who are unlikely to trust us ever again. I'll admit that "lost cause" is defined vaguely here, but I can't think of a better way to put it.