Mike McCormick, a stenographer in the White House for 15 years who worked with Biden from 2011 to 2017, told Fox & Friends First that the FBI has completely ignored him despite his willingness to testify under oath before the grand jury investigating Hunter.

"In February, I went to the FBI and filed one of their tips on their website. If you do that, and you're lying to them, you go to jail. I'm not lying. I'm telling the truth, and I'm not going to jail," McCormick said on Thursday. "Joe Biden is a criminal. He was conducting malfeasance in office to enrich his family. Jake Sullivan is a conspirator in that, and there's more... Obama officials involved in it, I believe."

McCormick specifically noted a key dialogue involving then-VP Biden, aide Jake Sullivan and the press on Air Force Two before an April 21, 2014 trip to Kyiv, Ukraine, in which Sullivan - now Biden's national security adviser - outlined a US investment in the Ukrainian energy sector just days after Hunter joined the board of Burisma.

Months after the trip, Congress allocated $50 million to Ukraine's energy market.

"I'm sitting back there with a tape recorder. Jake Sullivan comes back and somebody asks about fracking. His answer is, well, we're bringing a lot of American assistance over for fracking. Burisma was the direct beneficiary of that fracking, and that's what I recorded, and that's in a White House transcript," said McCormick, adding: "In the transcript, you don't know who Jake Sullivan is. It's a senior administration official. I'm the witness that says Jake Sullivan is the guy who said it and he should be investigated because at the time Hunter Biden was on the board of Burisma and Joe Biden is bringing American taxpayer money to enrich that company and himself and his family."