Last summer, history and government major Shannon Welch ’14 was an intern at the National Archives in Washington, D.C. She was paging documents at the Center for Legislative Archives when she stumbled across a little known and disturbing proposed constitutional amendment on the books in her home state of Maryland. “I came upon this 13th amendment that was making slavery institutionalized for the rest of time,” she said. “The federal government could never touch it. Then I found a document that Maryland had ratified it, and I was shocked. They let me keep researching, and I found out that Maryland had…