SAN FRANCISCO (AP) — A federal appeals court on Friday ruled against the Trump administration in its transfer of $2.5 billion from military construction projects to build sections of the U.S. border wall with Mexico, ruling it illegally sidestepped Congress, which gets to decide how to use the funds.

In two opinions, the 9th U.S. Circuit Court of Appeals agreed with a coalition of border states and environmental groups that contended the money transfer was unlawful and that building the wall would pose environmental threats.

Trump visited Yuma, Arizona, on Tuesday to mark completion of the 200th mile of border wall during his administration, much of it with the transferred military funds that the 9th Circuit panel found illegal.

After the Supreme Court gave the green light last year to begin work on the wall using Defense Department money, the Justice Department vowed to continue to defend the administration’s efforts to protect the southern border.

The American Civil Liberties Union, which sued on behalf of Sierra Club and Southern Border Communities Coalition, said if the Trump administration appeals, the case will go back to the Supreme Court where the ACLU will seek to tear down sections of the wall that were built with the military money.