Donald Trump’s Mental Decline Appears To Be ‘Gross Signs of Dementia,’ Psychology Expert Claims Former President Donald Trump looks to be developing dementia based on his slurred speech and his inability to construct whole phrases, mental health experts say. Psychologist Dr. John Gartner, formerly of Johns Hopkins University Medical School spoke to Salon and revealed the mental deterioration signs Trump has exhibited that Dr. Gartner believes are strongly linked to dementia. Since adding to the 2017 book The Dangerous Case of Donald Trump: 27 Psychiatrists and Mental Health Experts Assess a President, Dr. Gartner has been vocal about his concerns...