Sheldon Adelson, the billionaire casino magnate and main source of funding for the Winning Our Future super PAC, made the comment Wednesday at a Jewish leadership conference in Las Vegas, The Hill said, citing a report in the Jewish Journal.
"It appears as though he's at the end of his, at the end of his line 'cause, I mean, mathematically, he can't get anywhere near the numbers, and there's not -- unlikely there'll be a brokered convention," Adelson said.
Federal Election Commission documents show Adelson and his family have donated more than $16 million to the Gingrich Super PAC, including the most recent contribution of $5.5 million in late February, The Hill said.
The newspaper said other comments by Adelson make it appear unlikely he'll offer immediate financial support to other candidates.
Gingrich lags well behind Romney and Santorum in polls and the former House speaker's campaign told The Hill it would lay off a third of its staff and reduce its campaign schedule to try to make it to the GOP convention in Tampa in August.