The term 'malignant narcissist' can be used interchangeably with the term psychopath:
Title: "‘Malignant narcissist’: Why Donald Trump will never really change"
https://www.news.com.au/entertainment/books-magazines/books/malignant-narcissist-why-donald-trump-will-never-really-change/news-story/1df9cd1657b390a520b8520b616a7864Extract: "He recently turned his bitter feud with North Korean despot Kim Jong-un into a bromance, and backflipped on separating migrant kids from their families, but US President Donald Trump still thinks he’s Teflon.
And, a leading Australian psychologist warns, signs of a softer Donald Trump may be smoke and mirrors. He may appear a little softer, says Dr Helen McGrath, but he’s still a “malignant narcissist” at heart.
“He’s not changing. Malignant narcissists can’t,” Dr McGrath says.
…
In 2017, a collection of 27 psychiatrists and mental health experts argued Mr Trump has malignant narcissism, publishing a book, The Dangerous Case of Donald Trump., and challenging his fitness for office.
They argued that those with the disorder were grandiose, arrogant, self-centred, ruthless and would stop at nothing to get their own way, especially if they feel cornered or threatened.
They said Mr Trump’s propensity to lie publicly, fabricate information to suit his agenda, and refuse to admit he is wrong “even when strong evidence suggests this is the case” were classic indicators of malignant NDP.
…
She says Mr Trump, will always believe he is “Teflon man” because the malignant narcissist personality type always believes that it is the cleverest and is always right.
“Absolutely he thinks he’s cleverer than all of us, that he’s the cleverest leader of all and ultimately this will be revealed and shown,” she says.
Equally, the malignant narcissist goes on the attack with critics, and will “lie with ease” and reshape facts to suit themselves — hence, she says, Mr Trump’s term “fake news”, for anything he doesn’t want to hear or which paints him in a less than adoring light."
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Title: "Malignant narcissism"
https://en.wikipedia.org/wiki/Malignant_narcissismExtract: "The terms malignant narcissist and psychopath are sometimes used interchangeably because there is little to clinically separate the two. Individuals with narcissistic personality disorder, malignant narcissism, and psychopathy all display similar traits which are outlined in the Hare Psychopathy Checklist."