Grant was not a drunk. Too bad the author couldn’t do a little research before repeating old slanders.
The point being made in the essay I posted is that Grant was a fighter, and among the “things” he had to fight was alcohol, a fight not unknown to many of us.
HST, there is a rather fascinating article about Grant at http://www.historynet.com/ulysses-s-grants-lifelong-struggle-with-alcohol.htm. Perhaps you might enjoy reading it.
Grant appears to have, for the most part, kept his affinity for alcohol under control.