Rasmussen v. Idaho

Background

A dispute arose after Idaho passed a law letting the Governor investigate the condition of sheep in any locality and, if scab or another contagious disease was present, impose restrictions on bringing sheep into Idaho. The Governor, after consulting the state sheep inspector, examined reports and found scab epidemic conditions in specific localities in Utah and Nevada. He then ordered that sheep from those places be barred from entering Idaho for sixty days. A person seeking to bring sheep into Idaho challenged the restriction, and the Idaho Supreme Court upheld the statute.

Reasoning

The central question was whether Idaho’s statute conflicts with the Federal Constitution by unduly restricting interstate movement. The Court compared this case to an earlier Missouri law that imposed an absolute, months-long ban on certain cattle and was held to infringe federal powers. The Court explained that Idaho’s law is different because it requires investigation and official findings before any restriction, allows limits tailored to the facts, and is temporary. For those reasons the statute was treated as a legitimate quarantine law designed to protect local flocks, and the Court affirmed the Idaho high court’s judgment.

Real world impact

The decision leaves in place a state process that permits temporary, fact-based restrictions on animals from disease-affected areas to protect local agriculture. It means governors and inspectors can act after inspection and consultation to stop short-term disease spread without automatically triggering a federal constitutional problem. The ruling emphasizes that broad, continuous bans are different from targeted, investigatory quarantines.