The New York City Democratic primary for mayor was Andrew Cuomo’s to lose. The 67-year-old career politician was polling ahead for months and link icon=none linkend=https://www.wsj.com/politics/elections/in-tight-new-york-mayors-race-candidates-lean-on-endorsements-c1d34e39 type=EXTERNALhad support from billionaires/link, unions and old-guard Democrats like Bill Clinton.