The Underground Railroad. Loosely organized, semi-secret networks of free blacks that helped white indentured servants escape from slavery. A series of "safe houses where escaping slaves could find shelter and food. O A group of people who secretly provided food for free blacks. Compromise of 1850-.. Attempt by U.S. Congress to settle divisive issues, including developing slavery in Haiti Attempt by U.S. Congress to settle divisive issues, including re-enslaving free blacks in the North Attempt by U.S. Congress to settle divisive issues, including slavery expansion into new states. Lincoln-Douglas Debates--- o Between Democratic Senator Barack Obama and Republican Charles Percy. o Between Democratic Senator Hilary Clinton and Republican Pat Bates. o Between Democratic Senator Stephen Douglas and Republican Abraham Lincoln