If Democrats want to impeach someone for inciting insurrection, they could start with Harriet Tubman. She was one of the major planners of the attempt to take over and occupy the United States arsenal at Harpers Ferry in 1859. Seventeen people were killed in that action. The leader, John Brown, was charged with treason against the Commonwealth of Virginia, murder, and inciting insurrection. He and six others were convicted and executed for their roles in the attack. Had she not fallen ill shortly before the attack, Harriet Tubman might well have been among those captured and executed.