Without passageways to cross dams along the Columbia, salmon are dying. Tribes say the U.S. government isn't cooperating as they try to help the fish recover.
After two decades and $2 billion in spending, the U.S. government's promises to Native tribes to boost fish populations in Oregon and Washington haven't held up.
A win could mean more aggressive action to avoid climate disaster. Some environmental leaders think the lawsuit is a distraction from the action Jay Inslee and Kate Brown are pushing for.