(Washington, D.C.) -- The Trump administration is suing Oregon and three other states for not allowing federal vehicles to get confidential license plates. The U.S. Department of Justice has filed a lawsuit against Oregon, Washington, Maine, and Massachusetts. The lawsuit claims the states' actions are unconstitutional. They say the agents need the secrecy to avoid targeted harassment. Oregon DMV says it's paused issuing the plates while it reviews policies to make sure they comply with Oregon law. State and local law enforcement are not affected.