CHICAGO (AP) — Illinois leaders went to court Monday to stop President Donald Trump from sending National Guard troops to Chicago, escalating a clash between Democratic-led states and the Republican administration during an aggressive immigration enforcement operation in the nation’s third-largest city.

The legal challenge came hours after a judge blocked the Guard’s deployment in Portland, Oregon.

The lawsuit in Chicago also raised the stakes after a violent weekend: Authorities said a woman was shot by a federal agent when Border Patrol vehicles were boxed in and struck by other vehicles. The city’s police superintendent rejected suggestions that his officers were on the government’s side in volatile situations like that one.

The Trump administration has portrayed the cities as war-ravaged and lawless amid its crackdown on illegal immigration. Officials in Illinois and Oregon say military intervention isn’t needed and that federal involvement is inflaming the situation.

The lawsuit alleges that “these advances in President Trump’s long-declared ‘War’ on Chicago and Illinois are unlawful and dangerous.” Illinois Gov. JB Pritzker said a court hearing was scheduled for Thursday.

“Donald Trump is using our service members as political props and as pawns in his illegal effort to militarize our nation’s cities,” Pritzker, a Democrat, said.

Pritzker said some 300 of the state’s guard troops were to be federalized and deployed to Chicago, along with 400 others from Texas.

Pritzker said the potential deployment amounted to “Trump’s invasion,” and he called on Republican Texas Gov. Greg Abbott to block it. Abbott pushed back and said the crackdown was needed to protect federal workers who are in the city as part of the president’s increased immigration enforcement.

White House spokesperson Abigail Jackson confirmed in a weekend statement that Trump authorized using Illinois National Guard members, citing what she called “ongoing violent riots and lawlessness” that local leaders have not quelled.

The sight of armed Border Patrol agents making arrests near famous landmarks amplified concerns from Chicagoans already uneasy after an immigration crackdown that began last month. Agents have targeted immigrant-heavy and largely Latino areas.

Chicago Mayor Brandon Johnson said Monday that he signed an executive order barring federal immigration agents and others from using city-owned property, such as parking lots, garages and vacant lots, as staging areas for enforcement operations.