@RABEL222,
Sometimes known as the Mexican Repatriation, it continued into 1936 (some sources say 1939). Many of those deported we're American citizens.
It wasn't only Hoover, Franklin Roosevelt continued the sickening, disgusting, completely un-American practice
I have at times viewed this as the starting lineup towards how the U.S. treated Japanese people, including many second and further back generations of citizens with the onset of WW2.