McAuley, Paul J. "Cross Roads Blues"
Divergence: 1938 CE
What if: Bluesman Robert Johnson lived longer and his protest songs changed America.
Summary: A time traveler from the 1960s, when Adam Clayton Powell is president, plays a part in Johnson's life, but several years later he has to change it.
Published: In Interzone #46 (April 1991); rev. Little Machines, PS Publishing 2005 (1902880935, 1902880943); and A Very British History: The Best Science Fiction Stories of Paul McAuley, 1985-2011, PS Publishing 2013 (9781848635968).
— Posted on infinity plus, [[month unknown]] 2007.
Web link: infinity plus