By this time, Donnie had already left Ponzi's banquet with Nucky and the two had arrived at Nucky's study in the Ritz Hotel.
A rare seriousness appeared on Nucky's face.
Regarding the competition for the presidency, Nucky took it very seriously, after all, the last "King" of Atlantic City was sent to prison by Wilson, who was about to become the former President.
Although Nucky didn't think he would be the next "King," he indeed needed the President's help.
The things Donnie had just said at Ponzi's banquet surprised Nucky. The matter Donnie knew about Harding must be a scandal capable of affecting Harding's campaign.
Only then could Nucky make an issue of it.
A scandal doesn't necessarily mean having leverage over someone; it might also allow one to become a good friend of that person.
It all depends on how one plays their cards.
"Alright, Donnie, can you now show me what this surprise of yours is?"