A government witness said on Monday, during Antoin Rezko’s corruption trial, that he recalled seeing Sen. Barack Obama at a party that Rezko held in 2004 to honor Nadhmi Auchi, an Iraqi-born tycoon.

Stuart Levine testified that Obama and his wife Michelle attended the April 3, 2004 party honoring the London-based billionaire who was then visiting the United States and was later forbidden entry in the country.

During his presidential campaign, Obama has admitted his social and political ties with Rezko, a fundraiser for the Illinois senator, but he denied his presence at the Auchi party.

"As he has said previously, Senator Obama does not recall meeting Nadhmi Auchi at any time or on any occasion, and this includes any event that may have been held for Mr. Auchi. Senator and Mrs. Obama have no recollection of attending any such event," Obama spokesman Ben LaBolt said, according to the Chicago Tribune.

But two other guests at the party declared the Obamas were present at the event, which took place one week before Obama won his U.S. Senate seat.

Obama is not accused of any wrongdoing in connection to Rezko, but his relationship with the indicted political fundraiser is closely watched by the media, due to his presidential campaign.

Last month, during an interview with the Chicago Tribune, Obama described Rezko as a political supporter and not as a very close friend. He also recalled having met Rezko for breakfast or lunch a few times, but he never mentioned anything about a meeting at Rezko’s home.

Rezko also bought a lot next to Obama’s house and sold the Obamas a strip of land to expand their yard. Until now, Obama’s campaign has given to charity around $150,000 in Rezko-related contributions.

During the trial, Levine did not say much about the party at Rezko’s home or about the Obama family’s presence there.