One thing that is indisputable about President Donald Trump is that his pronouncements can never be trusted, not because they are right or wrong, but because he so often contradicts himself to the point where no one can trust where he stands on anything.
This repeated tendency may not qualify as a mental health problem worthy of a clinical diagnosis, as Richard Vatz noted in his commentary, "Diagnosing Donald Trump" (Jan.17), but it still raises question about Mr. Trump's fitness for the position he holds.
If there's one thing we need in a president, it's consistency. Mr. Trump's proclivity for changing his positions at the drop of a hat makes for constant uncertainty, and watching his senior staff and political allies try to make his assertions appear coherent has become a comedy of errors.
A president who leaves the nation, indeed the world, in a perpetual state of confusion and anxiety does not understand his role and is therefore not fit for the Oval Office, regardless of whether he is mentally ill.