If one could tell Trump what his biggest mistake as president was it would be too easy. He selected incompetent people like himself and when they thought for a moment he removed them.
'Why veterans groups want Trump’s VA secretary to resign'
'An inspector general report alleged that VA Secretary Robert Wilkie and his staff denigrated a veteran who claimed she was sexually assaulted.'
https://www.vox.com/2020/12/17/22180...-letter-resign