I've already started applying for citizenship in my mother's country. Just in case.
Families who saw what was happening in Germany in the 1930s and decided to leave were likely criticized at the time by those who stayed; in hindsight, this was a smart move. Conversely, if somebody moved out of the US because Reagan was elected...well, that decision probably looks a bit silly now.
I have no more gift of foresight than anybody else here, so I can't say if such a move now would be right or wrong.
But I am left wondering what facts would lead to such a decision today.