As President Trump continues to advocate for his megabill, Elon Musk’s online presence raises questions about his potential influence on Americans. NBC News’ Kelly O’Donnell and Jonathan Allen report more.

Other than every interaction either of them has had with another living being in their entire lives, as well as every single thing that is true about either of their personalities, and everything that either of them believes about themselves and each other and all others and life and the world,