The three branches of the government are the Executive, Legislative, and the Judicial branch. https://www.google.com/search?q=three+branches+of+government&rlz=1CAHPZQ_enUS786US786&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi5v5jGr7HdAhVJTd8KHY9RCS8Q_AUICigB&biw=1536&bih=720#
Explanation:
Fearing that the issue might disrupt the Republic, he argued for the doctrine of popular sovereignty-the right of the people of a state or territory to decide the slavery question for themselves-as a Union-saving formula. He led the fight in Congress for the Compromise of 1850.