Well, we all know the answers to why he hasn't been removed yet--the question is when can we be honest with ourselves for why Trump's "administration" is allowed to persist?
The absence of presidential leadership is a feature for the GOP Congress...not a bug. The absence of executive branch ethics, checks and balances is a feature for the GOP donor class, not a bug. They all see what Putin sees--a useful idiot who can be instrumental in implementing their agenda without question, without equivocation, without real thought. The only requirement is that they get someone in a room with him (either in the White House, but preferably at Mar A Lago or Bedminster or out on a green somewhere) and get them to frame the idea or argument in a way that Trump can later claim it was his idea all along, and let him take credit for it. They all know that at some point the clown car will come to a stop, the party will have to end, and hopefully they'll all get to grab a musical chair or a plea bargain while Trump and the worst of his cronies are hung out to dry. But in the meantime, get those judges appointed, get those cushy business deals secured, and tear up all the regulations and red tape in the way!