A federal judge temporarily blocks Trump from deploying National Guard troops to Chicago.

A federal judge has blocked Trump's plan to deploy hundreds of National Guard troops to Chicago to quell protests against his immigration policies. This marks the latest setback for the Trump administration's attempts to deploy troops to Democratic-run cities.

Following a hearing in Chicago on Thursday (October 9), U.S. District Judge April Perry issued a two-week halt to the president's order to deploy National Guard troops to Chicago. Another hearing is scheduled for October 22 to decide whether to extend the temporary restraining order for another 14 days. Meanwhile, the Trump administration is appealing a similar ruling by another judge that limited its deployment of troops to Portland, Oregon.

Illinois and the city of Chicago filed a lawsuit earlier this week, alleging that deploying the National Guard over their objections would be unconstitutional and violate state sovereignty. Perry said allowing the military into the state now could escalate conflict with protesters and do more harm than good, but she has not yet decided whether to grant Illinois and the city of Chicago's request for a longer-term injunction blocking the deployment until the case is resolved.

"Allowing the National Guard to deploy at the ICE processing center outside Chicago, or anywhere else in Illinois, would simply add fuel to the fire the defendants themselves have started," Perry noted.

The legality of Trump's use of military force could ultimately be decided by the U.S. Supreme Court, though the litigation could take months to reach that point.