I have friends who work at LANL and Sandia (the two national labs in New Mexico). As part of their employment, many aren’t permitted to have social media accounts of any type. This is for reasons of state secrets, national security, and homeland defence.
The president – our commander in chief – is privy to just googols of classified information of a crucially sensitive ilk. It’s not unreasonable to demand the same security protocols of our president as scientists at national labs.