Study finds Trump's signature policy has been an utter failure for his base voters

President Donald Trump has long framed his nationwide purge of immigrants as a policy to protect working Americans, who in his formulation have spent decades seeing their jobs go instead to foreigners and noncitizens while their communities struggle.

But a newly revealed working paper for the National Bureau of Economic Research, authored by Elizabeth Cox and Chloe N. East and flagged by New York Times economics reporter Lydia DePillis, suggests that not only has the mass deportation of...