Respuesta :
The Southern Democrats refused to nominate Stephen Douglas because he would not change his stand on popular sovereignty.
Answer:
He would not change his stand on popular sovereignty.
Explanation:
Stephen Douglas was an American politician and lawyer who was also the Democratic Party nominee for President in the 1860 election (where he was defeated by Abraham Lincoln). Douglas was a strong advocate of popular sovereignty. This was the belief that each territory should be allowed to determine whether to allow slavery to exist within its borders. The fact that Douglas would not change his stand on popular sovereignty meant that the Southern Democrats refused to nominate him.