C I think George was in britan
Granger laws were declared as an unconstitutional because they tried to have control over the interstate commerce, which was the federal government's responsibility by Gibbons v. Ogden. Granger Laws were laws that were passed in multiple midwestern states in US. These states include Iowa, Minnesota, Illinois, and Wisconsin.
The conclusion is that although a US president can technically send troops into a foreign country, in order to lawfully declare war, he or she must get the approval of Congress.