London: US President Donald Trump ruffled a few feathers in the UK with an intervention on the country's upcoming general election by backing his "friend" UK Prime Minister Boris Johnson and categorising Opposition Labour Party Leader Jeremy Corbyn as "so bad" for Britain.

In an interview with LBC Radio with host and far-right Brexit Party Leader Nigel Farage on the phone on Thursday, Trump pushed for an alliance between the Conservatives and Farage's party as an "unstoppable" force for the December 12 polls. "I have great relationships with many of the leaders, including Boris who's a fantastic man. I think he's the exact right guy for the times," Trump said.