One of the lamer claims about Trump is that he is "intelligent." He's obviously a skilled huckster and television performer, but any evidence of intelligence relevant to governance is completely absent. He's incoherent and unprepared on seemingly every issue, couldn't bother to learn enough to understand his own health care plan, and comes across as ignorant in his discussions with foreign leaders. He has the attention span of a gnat and the self-discipline of a five-year old.
So is this encroaching senility, or just a deformed personality in over his head?
Seventy is a little early for real senility, but it might fit with the cocaine theory.
Drug use had biggest impact on the prefrontal and temporal cortex, which are associated with attention, decision making and self regulation
Read more: http://www.dailymail.co.uk/health/article-2134414/Cocaine-rots-brain-Using-Class-A-drug-doubles-ageing-process-grey-matter.html#ixzz4ceV0Z11y