Nayak also told authorities he paid for two airline trips for a "social acquaintance" of the Democratic congressman at Jackson's request, raising more potential ethical and political problems for Jackson.
The FBI interviewed that acquaintance - a Washington, D.C., restaurant hostess named Giovana Huidobro - about a year ago as part of its corruption probe of Blagojevich. Authorities were trying to determine whether Jackson had asked Nayak to offer Blagojevich campaign cash in exchange for the then-governor appointing Jackson to the seat once held by President Obama, according to sources with knowledge of the probe.
Huidobro, Jackson and Nayak all dined together on Oct. 8, 2008 - the same day that Nayak has told authorities he had a key conversation with Jackson about the Senate appointment, sources said. The three then ended up at Ozio, the restaurant and club where Huidobro works and where Jackson has held fund-raisers.
Huidobro told authorities she knew nothing of Jackson's political dealings regarding the Senate seat, according to sources. She also said she flew to Chicago on several occasions at Jackson's request and that Jackson sometimes reimbursed her for her travels.
Nayak told the FBI that he paid for two airline trips for Huidobro from Washington to Chicago in 2008.
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Pressed about Huidobro, the congressman again said, "I have nothing to say."
Jackson does not appear to have reported the flights for Huidobro as a gift on his House financial-disclosure statement, and it's unclear whether he violated any ethics or fund-raising laws by not doing so.