Answer:
The Republican Party
Explanation:
The Republican Party promised not to get between the states and slavery, but then refused to further expand slavery into the territories.
It was the turning point of the war. It suggested that the United States might just win the War
He failed in his attempt to develop a more moral and less imperialistic policy in Latin American because he disregarded his ambassador by sending him home for being too aggressive. He also made decisions and took actions without the consent of the US Government. He ordered the Mexican port of Veracruz to be seized.