"I, (NAME), do solemnly swear that I will support and defend the Constitution of the United States against all enemies, foreign and domestic ..."
Every member of our military took that oath. People being people, somebody could act on it. Everyone in our military is a sworn threat to Donald Trump.
“Pentagon and intelligence officials described broad hesitation to go into detail with Mr. Trump about operations against Russia for concern over his reaction — and the possibility that he might countermand it or discuss it with foreign officials, as he did in 2017 when he mentioned a sensitive operation in Syria to the Russian foreign minister.” (U.S. Escalates Online Attacks on Russia’s Power Grid, New York Times, June 15, 2019)
More than 60,000 mental health professionals have warned of Trump's dangerous mental condition. ("The Dangerous Case of Donald Trump," Psychology Today, Sept. 28, 2017)
If you ask me, the greatest evidence of Trump's insanity is his desire to be anywhere near the military.