It is the "duty" of the POTUS to make these calls. 

I can't imagine what would lead you to believe that any part of Trump's "thought" process includes anything that could possibly be construed as "condolence", and it is not our '"duty" to try and ferret out his intent.

If his umpteen-godzillion braindead Tweets don't tell you who he is, then I will.

Our president is an inarticulate jackass who is so socially clumsy that he has to build his own golf course to get people to play with him.

God help us all.