What points did Douglass use to back up his argument that enslaved Americans were indeed human? Were they valid arguments? (Please answer ill give you brainiest)

What method did party bosses use to maintain the power of their political machines?

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.

How did southern slaveholders attempt to convince people in the north to support slavery?