In the 1935 landmark case of schechter poultry vs. united states, the supreme court ruled that parts of the new deal were unconstitutional.

was a decision by the Supreme Court of the United States that invalidated regulations of the poultry industry according to the non-delegation doctrine and as an invalid use of Congress' power under the commerce clause.

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source

https://en.wikipedia.org/wiki/A.L.A._Schechter_Poultry_Corp._v._United_States

the mexican-american war was a conflict between the united states and mexico, fought from april 1846 to february 1848.

so they can defeat there oppenent