Legal scholars and conservative attorneys say President Donald Trump’s use of federalized National Guard forces in California and other jurisdictions is likely to survive judicial review, even after a federal judge ruled the deployments violated a 150‑year‑old law that generally bars the military from ordinary policing.
U.S. District Judge Charles Breyer, a Clinton appointee, found in litigation brought by California Gov. Gavin Newsom that the administration improperly federalized state National Guard units and directed troops to perform law enforcement tasks, including accompanying Immigration and Customs Enforcement and the Drug Enforcement Administration on immigration raids and participating in crowd‑control and riot‑response missions. The U.S. Court of Appeals for the Ninth Circuit temporarily paused parts of Breyer’s order while the case proceeds, and lawyers said the matter is likely to reach higher courts.
Breyer concluded the administration’s explanation — that the forces were protecting federal personnel and property — did not justify the Guard’s broader activities and that some actions ran afoul of the Posse Comitatus Act. The judge noted that if the president sought to avoid Posse Comitatus restrictions he should invoke a statutory exception such as the Insurrection Act and meet the legal showing those laws require.
Legal observers said the ruling faces steep hurdles on appeal because courts historically grant broad deference to the president’s authority over the armed forces. Andrew Stoltman, an adjunct professor at Northwestern University and a Chicago‑based attorney, said he expects the Supreme Court ultimately to uphold the administration’s approach. “I think ultimately he will be given the legal green light to do so,” Stoltman said, adding that the dispute is likely to be decided by higher courts because the deployments have targeted Democratic‑led states.
Conservative legal advocates also criticized Breyer’s framing of the Guard’s role. Gerard Filitti of the Lawfare Project said the judge treated ordinary crowd control as unlawful law enforcement and that Guard members were stabilizing scenes so federal agents could operate. “The Guard wasn’t arresting people or running police investigations — they were stabilizing the situation so ICE could do its job,” Filitti said.
At issue in the litigation are two legal pathways presidents may use to federalize the National Guard: a lesser‑used rebellion statute the White House cited and the better‑known Insurrection Act, which contains explicit exceptions to Posse Comitatus. Breyer’s order emphasized that the administration must invoke and satisfy any statutory exception it claims.
President Trump has publicly floated plans to send Guard troops to other cities, including Chicago, New York and Baltimore, citing spikes in violent crime. The idea has prompted sharp pushback from some local officials and legal challenges in multiple jurisdictions.
Chicago Mayor and other Democratic leaders have called the proposals uncoordinated, uncalled‑for and politically motivated; Gov. J.B. Pritzker and other governors have rejected federalization in their states. Supporters of federal deployments point to immediate crime reductions in some places where Guard troops and additional federal agents were sent. The administration has pointed to Washington, D.C., where officials say carjackings are down more than 40% year over year and violent crime is down about 27% compared with the same period last year.
The D.C. response differs from cases elsewhere because of the District’s Home Rule Act, which gives the president authority to use the D.C. National Guard in support of federal operations for a limited period. Mayor Muriel Bowser publicly credited the presence of federal forces with helping reduce crime and signed an order formalizing cooperation with certain federal agencies, but the D.C. attorney general sued to challenge the deployment.
Conservative and libertarian analysts cautioned that Guard deployments are an immediate, not long‑term, remedy. Zack Smith, a senior legal fellow at the Heritage Foundation, said the presence of uniformed forces can help suppress violent crime quickly but does not address structural problems such as understaffed police forces and local prosecutorial practices that some critics say contribute to crime trends.
The administration’s use of federal troops in domestic law enforcement settings has raised broader constitutional and political questions about the balance of power between the presidency and state governments. If the Ninth Circuit’s temporary pause is lifted or reversed, the case could present the Supreme Court with an opportunity to clarify the limits of Posse Comitatus and the scope of presidential authority to federalize the Guard.
For now, the litigation continues in multiple courts and the status of deployments varies by jurisdiction. Legal experts said the combination of historical judicial deference on military matters, the stakes involved and the political prominence of the issue make a Supreme Court review likely if the appeals process runs its course.