Donald Trump Jr. bantered on social media with billionaire Elon Musk and influential podcaster Joe Rogan over which MSNBC shows they’d host if Musk — as he mused on this weekend — ends up buying the network.

At his side has been First Buddy Elon Musk, the billionaire who once said he’d rather “stay out of politics” and then set that side to barnstorm Pennsylvania on Trump’s behalf has settled in nicely and become a central figure in the transition, making himself home at Mar-a-Lago and tweeting up a storm about his new advisory role.