Justices were skeptical Monday that the case was an exception to other lawsuits against defense contractors, which usually get immunity in such litigation.
At a Senate hearing, Sen. Tommy Tuberville questioned whether the VBA needs subject matter experts to examine claims processes and recommend improvements.
Secretary Collins asked the U.S. Court of Appeals for Veterans Claims to stop its work during the government shutdown. Judges called the request "extreme."
Twenty-three states have aligned with the Trump administration's stance that he has authority to bring in the Guard, while 22 back the district's position.
Texas National Guard members are at an Army training center in Illinois, sent despite a lawsuit and vigorous opposition from Democratic elected leaders.