Behind the scenes, Mr. Cuomo was often obsessed with another set of numbers: his ratings. He would sometimes quiz aides as soon as he ended a broadcast about which networks carried him live and exactly when they cut away — data they were expected to have at their fingertips.For an image-obsessed politician who has long devoured almost everything written about him, it was an intoxicating amount of attention as Mr. Cuomo transformed almost overnight into a national leader of the Democratic Party and a foil for President Donald J. Trump. “To the 59 million viewers who shared in these daily briefings,” Mr. Cuomo said on his 111th and final daily update, “thank you.”
