The principle that a person cannot be held in prison without being charged with a crime is known as habeas corpus. This principle protects an individuals right to trial and due process if they are accused of committing a crime.
Their ideology was "Agrarianism, American nationalism, Anti-clericalism, Jeffersonianism, Liberalism, Classical liberalism, Populism, Republicanism", and these are the things backed by (of the four options) the rich and educated.