On June 13, 2018, an email exchange between Robert Costello and Michael Cohen revealed a potentially covert communication strategy involving Rudy Giuliani and President Trump. In the email, Costello informed Cohen that his friend, later identified as Giuliani, was meeting with his client that evening and offered to convey any messages from Cohen during the discussion.
During questioning, Cohen confirmed that the 'friend' mentioned in the email was indeed Giuliani, and the client referred to was President Trump. Cohen clarified the identities by stating, 'Donald J Trump — President Trump.'