The Trump presidency is too depressing to watch everything on TV about him, but the one hour doco Meet the Trumps on SBS earlier this week was pretty good. It's still up on SBS on Demand, I think.
It wasn't overly detailed, but just hit some of the key points of his life. (One thing I haven't heard, though, is why he is a teetotaller. Sure, his brother died an alcoholic, but it seems rare to find such an extrovert refraining from even alcohol.)
Anyway, the main thing I wanted to comment on was his early career dealing with Roy Cohn, the infamously unpopular lawyer who I actually didn't know much about until I watched that "Angels in America" play on TV some years ago. (We all have gaps in our knowledge.)
I'm not sure who it was on Meet the Trumps who was denouncing Cohn, but he had met him and could not stress enough what an absolutely appalling, dislikeable man he found him to be. Which I thought was interesting - the portrait of him in Angels seems not to have been overblown at all.
Anyway, here's an article in The Guardian about Cohn being a (sort of) mentor to Trump.