Donald Trump may be grabbing headlines over his proposals to impose ideological litmus tests on Muslim immigrants, but the fear of “foreign” ideologies and the use of immigration policy to police political heterodoxy are not original to the billionaire mogul.

For one, the Obama and Bush administrations both barred individuals from entering the United States because of their political views.

But even farther back — when the fear of anticapitalist labor agitation weighed especially heavily on the minds of elites — lays the illustrative case of Harry Bridges, the Australian-born labor leader. Though largely forgotten today outside of labor circles, Bridges was on the receiving end of a vast, unrelenting campaign in the 1930s and 1940s that sought to have him deported from the country.