Missouri Governor Lilburn Boggs trampled on the Constitution…. during his war on Mormons in 1838. When systematic harassment and confiscation of property failed to drive the Mormons away, Boggs issued the infamous Executive Order 44- the Mormon Extermination Order;
Your orders are, therefore, to hasten your operation with all possible speed. The Mormons must be treated as enemies, and must be exterminated or driven from the state if necessary for the public peace–their outrages are beyond all description. If you can increase your force, you are authorized to do so to any extent you may consider necessary.
To avoid further bloodshed… Mormon leaders agreed to leave Missouri, but the damage had been done. Partisan militias continued the bloody campaign of violence and terror continued for another two years. The order ultimately cost Boggs his political career, but it stands as a stark reminder of religious intolerance in America.