Research on immigration flows can point to complex, heterogeneous effects. But in research on increased immigration _enforcement_, negative social consequences are pretty much the rule. Arrests, detentions, and deportations make everyone worse off.
Jake GrumbachThis paper shows that immigration enforcement can _increase_ crime. Undocumented immigrants already have the lowest crime rate, but tough-on-immigration policy makes immigrants less likely to report crime. So immigration enforcement worsens the problem it was ostensibly meant to solve