A federal judge in Seattle is set to hear the first arguments Thursday in a multi-state lawsuit seeking to block President Donald Trump’s executive order ending the constitutional guarantee of birthright citizenship regardless of the parents’ immigration status.

U.S. District Judge John Coughenour, a Ronald Reagan appointee, scheduled the session to consider the request from Arizona, Illinois, Oregon and Washington. The case is one of five lawsuits being brought by 22 states and a number of immigrants rights groups across the country. The suits include personal testimonies from attorneys general who are U.S. citizens by birthright, and names pregnant women who are afraid their children won’t become U.S. citizens.