Second person is more rare, so its easier to avoid. I would go to your local library and find specific third person written books to get a good idea.
Answer:
Southern politicians supported the expansion of slavery into new states
Explanation:
The South tried their hardest to get slavery in the new territories, with Texas and Missouri both being notable examples. The north did not want the South to make slavery constitutional, and they did not support the expansion of slavery whatsoever.
The last opinion seems more reasonable because Islamic leader is cruel and blame the USA for everything. But not 100% positive