The number of people arrested and deported for being in the US illegally has dropped under President Joe Biden after his administration narrowed its enforcement focus to those who may pose a threat or have criminal backgrounds, marking a shift from the policies under the Trump administration.The number of people arrested and deported for being in the US illegally has dropped under President Joe Biden after his administration narrowed its enforcement focus to those who may pose a threat or have criminal backgrounds, marking a shift from the policies under the Trump administration.