https://www.vox.com/policy-and-politics/2017/6/13/15792822/trump-twitter-blocks-vote-vets-progressive-twitter-war
"The president’s Twitter account is an official arm of the White House. If veterans choose to address the Trump by tweeting at him, it’s likely because that seems to be his most favored method of communication — at all hours of the day and night. And being president means Trump doesn’t really have the luxury of picking and choosing which veterans he commands. He commands all of them. And if they have a grievance, it would behoove him to listen, rather than close his virtual ears."
