The U.S. population growth slowed sharply last year due to a steep drop in immigration.

A U.S. judge will hear arguments Monday on whether she should at least temporarily halt the immigration crackdown in Minnesota that has led to the fatal shootings of two people by government officers.

Ellison said during a news conference Sunday that the lawsuit is needed because of “the unprecedented nature of this surge. It is a novel abuse of the Constitution that we’re looking at right now. No ...