The correct answer is The Compromise of 1850.
The Compromise of 1850 helped to ease sectional tensions between Northern and Southern politicians temporarily. The conditions of this plan are as followed:
1) California enters the United States as a free state.
2) The New Mexio and Utah territories used the concept of popular sovereignty, meaning citizens who live there get to decide whether or not slavery will exist in their territory.
3) A new Fugitive Slave law is passed, requiring Northerners to return runaway slaves to their slave owners in the south.
4) The slave trade is banned in Washington DC.
nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.