CHICAGO (AP) — Northwestern University and the University of Chicago have joined other leading universities in siding with civil liberties lawyers in opposing President Donald Trump’s travel ban.

In papers filed Monday in a New York federal court, the schools contend the order blocking travel from seven predominantly Muslim countries threatens their abilities to educate future leaders from nearly every continent.

Northwestern President Morton Schapiro says the universities benefit greatly by bringing outstanding individuals from all over the world to study, teach and do research in the U.S. He added it’s important universities “continue to be able to do so.”

In addition to Chicago and Northwestern, the schools siding with civil liberties lawyers include Duke, Harvard, Yale, Vanderbilt, Princeton and Stanford.

A Brooklyn judge is one of several hearing challenges to the ban, which has been temporarily stayed.