Huron Portland Cement Co. v. City of Detroit

In a sense, both the majority and the minority of the Court were trying to balance two competing interests in Huron Cement Co. On the one hand, local units of government had the right to use "police power" to protect their citizens. On the other hand, companies engaged in interstate commerce had the right to expect a uniform standard that would apply in all fifty states, so that once they were licensed by the federal government, they could feel sure that they would be allowed to operate anywhere in the country.