A judge on Monday gave President Donald Trump's administration two days to respond to Illinois' legal challenge of the deployment of hundreds of federalized national guard troops to Chicago, even as U.S. lawyers said the troops were on the way from Texas.

The case is the latest flashpoint in a growing number of court battles over the Republican president's authority to deploy military forces domestically, including from friendly Republican-led states into states whose Democratic leaders say they are being illegally targeted and falsely portrayed as awash in crime.

In addition to telling a U.S. district judge that Texas National Guard troops were in transit to Chicago, federal lawyers said the administration could still deploy troops while it organizes a legal response to Illinois’ request for a temporary restraining order.