When Donald Trump first ran for president in 2015, he promised that he would implement a process for deporting the 11 million residents of the United States who are here without authorization. There would be a “deportation force,” he said, one that leveraged local law enforcement to identify and expel undocumented immigrants. He offered words of praise for the deportation program implemented under President Dwight D. Eisenhower in the 1950s, an effort known by the racist name “Operation Wetback.”