The Donovan Adkisson Show

Joe Rogan has one of the, if not the most successful podcasts in the world now.  He's had a wide variety of guests on his show; some being crazy nutters like Alex Jones, RFK Jr., etc.  The one person he hasn't had on his show, so far, is Donald Trump.  And that's not due to Trump's team not trying.  Joe has said in the past that he doesn't want to support him, but now he says he'd like to have a conversation about what it's really like to be President of the United States.  Why not have Obama or Joe Biden then?