On August 16, 1841, U.S. President John Tyler vetoed a bill to re-establish the Second Bank of the United States. 
Enraged Whig Party members — feeling betrayed by the WINO* Tyler — rioted outside the White House in history’s most violent demonstration on White House grounds.
* “Whig In Name Only,” anachronistic joke term. A play on the contemporary initialisms “Republican in Name Only” (RINO) and “Democrat in Name Only” (DINO).