Al Smith’s 1922 gubernatorial plurality was the largest in state history

Evidence

Moses had transferred his allegiance, and the transfer was appreciated by the man to whom he was now giving it. Al Smith won back the Governorship—by 387,000 votes, the largest plurality any gubernatorial candidate had ever been given in the state, a plurality large enough to pull in behind him every other Democratic nominee for statewide office. — Robert A. Caro, The Power Broker, 598