One effect of the emancipation proclamation was that it
1) immediately freed southern slaves
2) gave a moral purpose to the war
3) united the republican party
4) kept great britain out of the war

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.