Chose to sue his master's widow for his freedom. He argued that his master, John Emerson, escorted him onto free soil in Illinois and the Wisconsin Territory, so he'd legally—even if inadvertently—granted him freedom.
Munn V. Illinois allowed the government more access to and the ability to regulate to private business.
Are you talking about Percy Jackson?
Conference committees operate after the House and the Senate have passed different versions of a bill. Conference committees exist to draft a compromise bill that both houses can accept. Both houses of Congress must eventually pass identical legislation for the bill to be presented to the President.