Dutch television current affairs show Zembla is claiming that US president Donald Trump has extensive connections to Russian oligarchs and even to convicted gangsters.

The 45-minute documentary looks at Trumps alleged relationship with Russian mobster Felix Slater and agreements he has with rich Russians.

‘The Russians are alleged to be in possession of sensitive information about Trump. And that exposes Trump to blackmail,’ the programme makers say.

‘Fake news, tweets Trump: “I have nothing to do with Russia – no deals, no loans, no nothing!” Trump swears he has no ties with the Russians. But is that actually the case?’ the programme asks.