When South Carolina seceded what was Lincoln's reaction?

President Lincoln feared it was the end of democracy because the main reason for their secession was due to him winning the presidential election as a Republican.

This angered the people of South Carolina and they declared that they were leaving the Union. Six more states followed a month later and, by June, a total of 11 southern states were no longer part of the country.

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he sent troops to protect the students as they entered the school.