Answer:
California as a non-slave state
Step-by-step explanation:
The Southerners were mad when California entered as a free state because they believed that slavery will be permitted within the state. After all, it rests below the Missouri compromise line.
There was a heated debate in the US congress when California entered as a free state from the Southern side. To please the South, new and more effective fugitive slaves laws were proposed.
The South has always favored the system of slavery as their economy was based on agriculture and producing cash crops. Slaves were required in plantation to do work in fields.