He could have a split personality. It happens when people engage in a behavior for so long they don’t approve of themselves. Literally, one part of their personality so completely disassociates that they genuinely can’t remember when they’re in another personality. It’s called schizophrenia or bi-polar disorder.
We have too many in congress with mental disorders as it is. People with mental disorders lack the judgment at times, to hold office. Sorry they are ill, but still shouldn’t be in office.