
With his latest round of attacks on four first-year members of Congress who are women of color, President Trump has once again touched the raw nerve of racism in American life.
He has also tapped into one of the oldest strains in our politics — the fear and vilification of immigrants and their descendants.
Although three of the four women were born in the United States, the president said they should all "go back" where they came from. That phrase has echoed down generations of nativist discourse as successive waves of newcomers have been targeted by individuals, groups and even whole political parties.
At times, the motivations have been economic, focusing on competition for jobs and such social goods as housing or welfare programs. But there has also been a recurrent theme of cultural differences – an emphasis on characteristics of religion or language that identify new arrivals as "the other."