Chalker, Jack L. "Now Falls the Cold, Cold Night"
Divergence: 1856 CE
What if: James Buchanan suffered a stroke in October 1856 and Millard Fillmore, candidate of the American ("Know-Nothing") Party, was elected president.
Summary: When Fillmore upholds the Fugitive Slave Laws in 1858, rioting and worse erupts in New England.
Published: In Alternate Presidents (ed. Mike Resnick), q.v.