How did the outcome of the War of 1812 affect the United States?

In fact, the war had a far-reaching impact in the United States, as the Treaty of Ghent ended decades of bitter partisan infighting in government and ushered in the so-called “Era of Good Feelings.” The war also marked the demise of the Federalist Party, which had been accused of being unpatriotic for its antiwar

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

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