Lawyers, teachers and politicians marched among thousands of demonstrators across the U.S. on Thursday to protest President Donald Trump's policies on immigration, the targeting of lawyers and judges,

The mass demonstrations occurred on a day that historically has been the province of a variety of causes. May 1 is “Loyalty Day” in the United States, first proclaimed during the administration of President Dwight D. Eisenhower in the 1950s at the peak of “Red Scare” and Cold War era.