What past mass deportation policies show about Trump's immigration plans. About a million Mexicans and Americans of Mexican descent were forced to leave the United States in the 1930s due to a policy of mass deportations.
Years later, in the 1950s under President Dwight Eisenhower, Operation Wetbacks was in effect. With it, the Government used military-style tactics to arrest nearly 1.3 million people of Latino descent. Most of them were Mexican, many even though they had arrived legally with the bracero program.