Oregon Attorney General Ellen Rosenblum announced Monday that Oregon has signed on with 15 other states to an amicus brief in the U.S. 9th Circuit Court of Appeals in support of Washington in their federal lawsuit against the Trump Administration's executive order on immigration, according to a press release from Rosenblum's office.

A temporary restraining order was issued by a Washington state federal judge last week ordering a nationwide halt to implementation of President Trump's executive order on immigration. The court is expected to decide in the next few days whether to uphold the trial court's ruling after the federal government appealed.

"If the appellate court upholds the TRO, which we hope it will, it is likely to send it back to the trial court in Washington state for further proceedings," Rosenblum said. "We want to be ready to help in any way we can to establish the permanent illegality of the executive order."

In addition to Oregon, the amicus brief is signed by attorneys general from California, Connecticut, Delaware, the District of Columbia, Illinois, Iowa, Maine, Massachusetts , Maryland, New Mexico, New York, Pennsylvania, Rhode Island, Vermont and Virginia.

Oregon and the other states outline the harm that the executive order has caused residents, and outlines that the states have standing to challenge the immigration executive order because of the harm the order inflicts on the states themselves.

In addition to joining the amicus brief, Oregon is in close coordination with the Washington attorney general, and will jointly ask the Washington judge to allow an amendment to add Oregon to the lawsuit -- possibly as soon as Tuesday. The Washington complaint alleges that the President's executive order on immigration is unconstitutional on multiple grounds, including religious and national origin discrimination.

"I am pleased that Washington Attorney General Bob Ferguson has invited us to join their lawsuit against the federal government," Rosenblum said. "By joining Washington, we will be able to share legal resources with our neighboring state and at the same time ensure that the voices of Oregonians harmed by the President's executive order are heard."

(c)2017 The Observer (La Grande, Ore.)