​"At one point during what the sources describe as a 'massive blowup' and a 'huge explosion', Musk accused Epshteyn of leaking details of Trump's transition -- including personnel picks -- to the media. Epshteyn responded by telling Musk that he didn't know what he was talking about," Axios reported adding that Epshteyn had been bristling over Musk questioning the qualification of candidates proposed by Epshteyn.