Funny you should bring up "those people" who planned to flee Trump's US.  

I ran across this quote from a letter Abraham Lincoln wrote in 1855 when the Know-Nothings (the American Party) feared for the country's safety due to the immigration of Irish Catholics.

“As a nation, we began by declaring that ‘all men are created equal.’ We now practically read it ‘all men are created equal, except negroes.’ When the Know-Nothings get control, it will read ‘all men are created equal, except negroes and foreigners and Catholics.’ When it comes to this I should prefer emigrating to some country where they make no pretense of loving liberty—to Russia, for instance, where despotism can be taken pure, and without the base alloy of hypocrisy.”

Lincoln decided not to emigrate to Russia and stuck around to help "negroes" into the created equal category.  Unfortunately "foreigners" are still on the list, though we've managed to replace Catholics with Muslims.