Senate leader is always the vice-president and I don't know about the house
A. The Republicans gained a majority in both the House of Representatives and Senate. 54 seats went to the party in the House and 8 in the Senate
This is true. He supported ideas of taking political action instead of rising in rebellion. He believed that African-Americans should have their own peace of land where they could live freely and not suffer from harassment. He also supported the idea of not buying anything that was made by slaves which was also a political action.
Because, predominantly in the agricultural Western region of the United States, the demand for cheap labor was extremely high at the time. The source of this cheap labor were Mexican immigrants.