What Is It? An Imposter Or Madness?

I Am Not A Liar!

In June of 2017, at the start of Donald Trump's first term, Sean Spicer, then the White House Press Secretary, said that Donald Trump's tweets "are considered official statements by the President of the United States."  I did a search and could find no policy change from the White House that retracted or disavowed that statement.  

I just read that the actor Kelsey Grammer said he liked President Trump, adding "I've never seen a more transparent presidency in my life".  I'm not sure that publicly and continuously lying qualifies as transparent, but what are we to make of the recent racist post picturing President Obama and his wife?

Was that post and picture an "official statement" from the President of the United States?

Trump now claims that he didn't make the racist post.  It was posted on his account by some unnamed staff member and the post has now been taken down.  Is this follow-up statement a transparent clarification or just another lie?

So which is it?  Are his posts still supposed to be taken as policy?  Trump clearly intends them to be taken seriously.  Or, are there staff members who are free to make official presidential announcements without Trump's knowledge?  Or, are these posts just the ramblings of a seriously damaged mind?

Finally, should Trump still be in control of the nuclear codes?  I wonder if some un-named staff member also has the codes.