Gov. Tina Kotek (D-OR) on Monday ordered the Oregon DMV to continue halting the issuance of undercover license plates to Immigration and Customs Enforcement officials in resistance to the Trump administration, which has deemed it unconstitutional.

A May 28 press release from the Department of Justice said the department filed lawsuits against Maine, Washington, Oregon, and Massachusetts after each state passed “unconstitutional policies denying confidential license plates to federal agents,” arguing the policies threatened the effectiveness and safety of federal agents. “If federal agents cannot use confidential plates, dangerous individuals can track and evade law enforcement. There is no justification for states to deny confidential license plates to federal agents,” the DOJ said.