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.

For the third time in a month, tens of thousands of protesters took to the streets, government buildings and the White House in a nationwide rally against the Trump administration. Driving the news: Thursday's May Day protests fall on International Workers' Day and are calling attention to policies that affect working people,