The Compromise of 1850 was an effort by the United States Congress that was drafted by Henry Clay, who was both the U.S. Senator and the House Representative of Kentucky. This compromise was a series of acts passed in 1850, attempted to reconcile Northern and Southern interests to preserve the Civil War. After the start of the Mexican-American War, conflicts about whether to allow slavery in those new territories to polarized Northern and Southern of the United States raised up. Northerners were in favor the Compromise, since they thought it’s a good chance to stop slavery. On the other hand, Southerners were against it, they thought it threatened their political power because the join of territory--California would disturb the balance of 15 free states and 15 slave states.