The All of Mexico Movement (also called All Mexico Movement) was a political movement to expand the United States, so that it would include all of Mexico. It was an expression of Manifest Destiny but it never went into effect.
The correct answers are A) economic differences, B) the presidential election of 1860, D) social differences, and E) the issue of slavery.
<em>The following were causes of sectionalism: A) economic differences, the presidential election of 1860, social differences, and the issue of slavery.</em>
Sectionalism divided the United States into many forms. It confronted American people on a variety of issues that ended up in a bloody Civil War. The presidential election of 1860 divided the nation. Republican candidate Abraham Lincoln defeated Democratic candidate Stephen A Douglass, and Constitutional Union candidate Jhon Bell. There were many economic differences that divided poor people that tried to make a living with the wealthier people. This created social differences that were notorious and showed the lack of basic things that many people had. And of course, slavery, the issue that divided the North against the South. The Northern states supported desegregation laws while in the South they were against desegregation. For the Southern states, slavery was the base of the economy in the farm fields.
