Romney aides would not say if they have pursued Singer's support, but rivals said they would be shocked if he has not. In September 2009, Romney was photographed seated at a table with Singer at a forum of the Foreign Policy Initiative at the W Hotel in Washington.
A spokesman for Elliott Associates said neither the company nor Singer would comment on the Romney investment.
This is not the first time a wealthy candidate has seen their financial disclosure filings elicit questions about the potential for a personal fortune to pay political dividends.
Just last year, the New York Times reported that Republican candidate for California governor, Meg Whitman, invested $1 million of her vast fortune in a fledgling movie production firm started by a very prominent and much-sought-after Republican strategist. Her critics noted that the investment came just as the strategist, Mike Murphy, was in talks to join the campaign of a Whitman rival -- talks that fell through right after she made her investment.