Hundreds of National Guard troops deployed to Chicago and Portland, Oregon, are being sent home, and those who will remain will continue to stay off the streets amid court battles over their domestic mission by the Trump administration, a defense official said Monday.

The withdrawal of soldiers — sent from California and Texas — is part of a larger change to troop deployments after President Donald Trump began his immigration crackdown in various cities with Democratic leadership. The official was not authorized to publicly discuss the issue and requested anonymity.

U.S. Northern Command said in a statement Sunday it was “shifting and/or rightsizing” units in Portland, Los Angeles and Chicago, although it said there would be a “constant, enduring, and long-term presence in each city.”

In the coming days, all 200 California National Guard troops currently deployed to Portland will be sent home, the official said. The military also plans to cut the number of Oregon National Guard troops on deployment there from 200 soldiers to 100, the official said.

About 200 Texas National Guard troops in Chicago also are being sent home and about 200 soldiers will be on standby at Fort Bliss, an Army base that stretches across parts of Texas and New Mexico, the official said.

About 300 Illinois National Guard troops will remain in the Chicago area, also doing training, but they currently are not legally allowed to conduct operations with the Department of Homeland Security, the official said.

The official said the upcoming holiday season may have played a role in the change in deployments.