Why is repeat offender Donald Trump still a free man?
Because it's America, an the rich are above the law.
To me, and I suspect to many international observers, Trump is a product of modern America -- a product of a corrupt financial and econonic system, a corrupt political system, and a corrupt legal system. He will linger and finally prevail because of the lerks and perks that the US legal system affords the rich and powerful, then the elections will favour the Republicans (because Americans are utterly predictable) and then it will be payback time. You can see it coming.
I do hope that there will be a comeuppance but I rather suspect that the jackboot crowd will eliminate democracy and do their best to install a totalitarian regime. Nobody seems to have complained too loudly so far, nobody that couldn't be quieted at least.