James Gadsden was sent to ______________ to purchase land for the United States.

In the __________, Stephen Douglas argued that people of a territory could effectively exclude slavery in a territory by refusing to pass laws to protect slavery.

Senator Stephen Douglas from Illinois was known as the ______________.

________ wrote the antislavery novel, Uncle Tom's Cabin.

____________ led a raid on the federal armory in Harpers Ferry, Virginia in 1859 to obtain weapons for a slave uprising.