1) Nobody tells Trump what to do.
In one stark example, the president’s dislike of being told what to do played a role in his decision to abruptly ban all transgender people from the military: a move opposed by his own defense secretary, James Mattis, and the head of the Coast Guard, who vowed not to honor the president’s decree.
The president had grown tired of White House lawyers telling him what he could and could not do on the ban and numerous other issues such as labor regulations, said one informal White House adviser. While multiple factors were in play with the transgender ban, Trump has grown increasingly frustrated by the lawyers’ calls for further study and caution, so he took it upon himself to tweet out the news of the ban, partly as a reminder to the lawyers who’s in charge, the adviser said.
2) "Put it this way: 'Not my president' used to sound like an extreme slogan. Now it has more or less become the operating principle for key parts of the U.S. system."