https://www.foxnews.com/us/texas-students-to-be-taught-slavery-played-central-role-in-civil-war

Students were being taught that there were three causes for the Civil War: sectionalism, states’ rights and slavery.

The board’s Democrats favored listing slavery as the only cause.

What the use of 'states' rights' is doing is essentially blanketing, or skirting, the real foundational issue, which is slavery," Democratic board member Marisa Perez-Diaz, of San Antonio, said at a Tuesday board meeting, NPR reported.

Guess they never heard of tariffs