Democrats attacking Romney's comments at the fundraiser also seized on a New York Post report about Leder that suggested the hedge fund executive threw at least one party that featured guests openly performing sexual acts.

"At the Bridgehampton home that Leder rented for a whopping $500,000 a month, guests cavorted nude in a pool and performed sex acts, while scantily clad Russian women danced on platforms," the Post reported. "Dancers at the party also twirled flaming torches to booming beats."

Leder, a co-owner of the NBA's Philadelphia 76ers, has hosted three fundraisers for Romney, the first in 2004. But he said he had also held events for Democrats.

"I have supported people from both political parties who share this view and make it a priority, even though their ideas on how to achieve it may differ," Leder said.