Grassley has demanded that the FBI release the tapes. Clearly, he wouldn't ask for them if he didn't believe they exist.
Grassley Reveals Existence Of Biden Tapes Related To Bribery Allegations
Republican Rep James Comer of Kentucky and Grassley wrote to the FBI on May 3 to demand that the agency produce the document that reportedly details a bribery scheme involving then-Vice President Biden. Comer, the chairman of the House Oversight Committee, and Democratic Rep. Jamie Raskin of Maryland, the ranking minority member of the House Oversight Committee, reviewed the unclassified document known as a FD-1023 June in a secure facility.
Sen. Charles Grassley said Monday that a Burisma executive has recordings of then-Vice President Joe Biden and Hunter Biden related to a bribery allegation.
dailycaller.com