(CNN) – A Chicago businessman told federal investigators that Rep. Jesse Jackson Jr. asked him to pay for a Washington, D.C. restaurant hostess to fly between Washington and Chicago multiple times, the Chicago Sun-Times reported Tuesday.
Jackson told the paper he was "deeply sorry" that he had "disappointed some supporters," in a written statement.
"The reference to a social acquaintance is a private and personal matter between me and my wife that was handled some time ago. I ask that you respect our privacy," Jackson said in his statement.
Jackson's wife also appealed for privacy in a statement to the Chicago Tribune.
"Today's disclosure, one that my family and I have been privately addressing for several months, is a very private, painful and unfortunate situation. Therefore, I would hope that the public will respect our ongoing personal handling and healing from this matter," Sandi Jackson said.
If Nayak did pay for flights at the request of the Jackson, it may be considered a violation of the House gift ban, which forbids members of Congress from receiving gifts valued over $50.
The Sun-Times also reported that Raghuveer Nayak told the F.B.I. that Jackson asked him fundraise $6 million for former Illinois Gov. Rod Blagojevich in exchange for an appointment to the Senate seat vacated by President Barack Obama.
In the written statement to the Sun-Times, Jackson dismissed the allegations.
"The allegations about fund-raising and the Senate seat are not new. I've already talked with the authorities about these claims, told them they were false, and no charges have been brought against me. The very idea of raising millions of dollars for a campaign other than my own is preposterous. My interest in the Senate seat was based on years of public service, which I am proud of, not some improper scheme with anyone," the statement said.
A House ethics panel said it would investigate Rep. Jackson last year for allegedly launching a "public campaign" to be appointed to the Senate seat. The investigation was deferred at the request of the Justice Department because of the criminal indictment against Blagojevich. In August, the former governor was convicted of lying to federal agents on one of 24 counts brought against him by the government.
Jackson's office has not responded to requests from CNN for comment.