Why does the state department exist in the united states?

The US Department of State functions as the diplomatic wing of the federal government, handling matters of foreign affairs with other nations and international bodies. The State Department's primary job is to promote American foreign policy throughout the world.

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president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.