Let's just get right into this: President Trump in an interview doesn't seem to know why the Civil War happened and also seems to think that "people" don't ask questions about it. Here's the audio clip:
Here's the transcript:
Here's the answer, President Trump: Slavery. The Civil War happened because of slavery in the United States. And Andrew Jackson, the seventh president, owned slaves and a plantation. And he died in 1845 — the Civil War began in 1861.
Trump later clarified that Jackson saw the war coming before he died. But, still no mention of that thing that caused the war and Jackson was complicit in: slavery.