Farmers, small businesses and states scored a big victory earlier this month when a federal court issued a temporary stay on the Environmental Protection Ag­­ency’s (EPA) implementation of the Waters of the United States (WOTUS) rule. But it’s still crucial for Congress to pass legislation to kill the rule, an environmental policy expert said last week.

"This is only a temporary in­­junction, and that’s something that farmers and ranchers should be very cognizant of," said Don Parrish, American Farm Bur­eau Federation (AFBF) senior...