What two factors contributed to the liberation of Hatian slaves?

Who issued the ruling for the supreme court? dred scott roger b. taney abraham lincoln john c. calhoun

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b.the united states should end slavery. c.the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii

Only 1 vote per state regardless of size why is this a problem