4. Wisconsin and the Fugitive Slave Act (1854)
In 1854, Wisconsin’s Supreme Court declared the federal Fugitive Slave Act unconstitutional, refusing to enforce it. This act of defiance, during a period of deepening sectionalism, highlighted growing resistance among northern states to federal pro-slavery mandates. The stand was eventually overturned by the U.S. Supreme Court, but Wisconsin’s bold resistance galvanized abolitionists (via wisconsinhistory.org).
