Bisson, Terry. Any Day Now
Divergence: c 1953 CE
What if: The 1950s and 1960s were just ever so slightly different, until things seriously changed in 1968 with the resignation of President Johnson and then turned seriously bad at the 1969 inaugural.
Summary: The crack-up of the United States as observed by a young man, first living in New York City and then on a commune in Colorado.
Published: Overlook 2012 (1590207092BUY), 2013 (1468303341BUY); and Gerald Duckworth 2013 (0715645153BUY).