When he became president of the confederacy, jefferson davis believed that?

Unquestionable right to leave the union

Explanation:

Before the American Civil War, he operated a large cotton plantation in Mississippi, which his brother Joseph gave him, and owned as many as 113 slaves. Although Davis argued against secession in 1858, he believed that states had an unquestionable right to leave the Union.

i dont know sorry, but ik that you need to pay attention in class

the democratic party is the answer because they disapproved of slavery