Briefly explain one specific reason given by those in the United States who supported the War of 1812

When the United States declared war against Britain in June 1812, the vote on the declaration of war in the Congress was the closest vote on any formal declaration of war in the country's history or since. Only 81% of the Republicans in both houses voted for the war, and not a one of the Federalists did. The close vote reflects how unpopular the war was to large segments of the American public.

The opposition to the War of 1812 broke out in riots in the east, particularly Baltimore and New York City. The reasons for that opposition had much to do with the newness of the country and its inexperience with global politics; and the messy and unclear motives

Explanation:

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.