In a 6-3 decision, the high court sided with a lower court ruling that blocked deployment of troops to the Illinois city

The US supreme court refused on Tuesday to let Donald Trump send national guard troops to the Chicago area, in an important reining-in of the US president’s efforts to expand the use of the military for domestic purposes in historic moves against a growing number of Democratic-led jurisdictions.

The nation’s highest court denied the US justice department’s request to lift a judge’s order in October that has blocked the deployment of hundreds of national guard personnel in a legal challenge brought by Illinois state officials and local leaders, who had opposed any federalization of those troops to offer backup to immigration enforcement.