“That’s another way of unleashing the states, not only to work with the federal government, but also to acquiesce in the states’ enactment of their own immigration enforcement, detention, and removal regimes,” said Lucas Guttentag, a Stanford Law School professor who runs a project tracking federal immigration policy, speaking in a May interview published by Berkeley Journal of Criminal Law.

Combating the federal moves is already fraught, said Guttentag, who has served in immigration policy positions in the Obama and Biden administrations.

“No single political strategy can change it,” Guttentag told Stateline this week. “But litigation has proven both critical and effective in limiting some of the most egregious violations. The violence is a clear violation.”

It’s hard to police an administration that constantly pushes legal boundaries, Guttentag added.

“It’s like a ‘catch me if you can’ administration. They adopt tactics and basically challenge anyone to try to stop them.”