Original sentence: Following Abraham Lincoln's election as President of the United States in 1860 on a platform that opposed the extension of slavery, seven slave southern states chose to secede from the United States and declared that the Confederate States of America was formed on February 4, 1861
Edited sentence: Following Abraham Lincoln's election as President of the United States in 1860 on a platform that sought to raise import taxes to benefit northern manufacturers, seven slave southern states chose to secede from the United States and declared that the Confederate States of America was formed on February 4, 1861