Donald Trump now looks like the front-runner to be the Republican candidate for the US presidency. One of his big appeals is his business success - and his claim that his wealth means he can't be bought and sold. But there's evidence which not only casts doubt on Trump's wealth claims - but also reveals his history of business relationships with figures connected to organised crime. John Sweeney reports. Newsnight is the BBC's flagship news and current affairs TV programme - with analysis, debate, exclusives, and robust interviews. Subscribe to our YouTube channel for highlights and bonus videos bbc.in/1iouM30 Follow us on Twitter @BBCNewsnight for the latest updates on #newsnight Add us on Snapchat - our username is 'BBCNewsnight' And follow on Facebook for our best material, an early heads up on what's coming up, and to join in our debates www.facebook.com/bbcnewsnight