You know I think we may be overlooking something with the passing of the POTUS' brother. To preface about the POTUS, people can say or claim whatever they want about the man but I doubt anyone would ever argue with the fact he has always shown great loyalty and love toward both his family and/or those he sees as loyal/honorable people. Especially his family of course as Trump has always been very loving and helpful to them, even his ex who he remains on good terms with.
But now his brother passes away and he plans to have a memorial at the WH. On its face that may not sound like a big deal but I tend to think it is something else and actually goes hand in hand with his "you won't see me for a long time" statement. We always thought he meant he would disappear, wouldn't give interviews, etc, but we were wrong and we now know he is giving interviews and doing all his work from… the White House. So him saying "you won't see me for awhile" seems to clearly point to him staying in the secure confines of the WH during this time period.
So let's consider what would keep a man like Trump, a man who clearly and shown for many years his love for family, what would keep him from showing up to his brothers service outside the WH and at the same time still want to honor his brother at the WH? I see this as a security issue and there must be a very serious threat against him at this time to which the SS has suggested, and he agrees, that he needs to remain in the secure WH until the threat is handled.
If that is indeed true, and if that is indeed what is happening here then, and I really hate to say this as this is tin foil land which I really dislike to go down, but I have to wonder if the death of his brother was a means to try to draw him out of the WH security perimeter and into a position where he was venerable. Could be wrong here, likely am, but I just found the lack of him attending his brothers funeral outside the WH and instead having it there is very unlike Donald Trump and the only logical conclusion I have for it is security needs based on a serious threat that the SS identified.