The 67-year-old socialist, formerly little known outside leftist political wings, was selected to lead Labour last year after winning the support of Britain's trade unions, which control large numbers of votes. Corbyn has been wildly popular with Labour's grass roots but is at odds with many of his fellow Labour politicians, who claim he is unelectable.
After a vote of no confidence from his fellow Labour lawmakers over his low-key role in the campaign that preceded Britain's Brexit referendum this summer, Corbyn was reelected party leader in September. The election has hardly fostered unity in the Labour Party, however, offering very little in the way of a challenge to Prime Minister Theresa May, who took office in July.
In response to Obama's comments, a spokesman for Corbyn gave a statement to the Guardian:
"Both Labour and US Democrats will have to challenge power if they are going to speak for working people and change a broken system that isn't delivering for the majority.
"What Jeremy Corbyn stands for is what most people want: to take on the tax cheats, create a fairer economy, fund a fully public NHS [National Health Service], build more homes and stop backing illegal wars.
"For the establishment, those ideas are dangerous. For most people in Britain, they're common sense and grounded in reality."
Obama and Corbyn have met before: According to reports in the British press, they met for an hour and a half in April. After the talk, Corbyn said the two men had an "excellent" discussion that touched on the "challenges facing post-industrial societies".
In the past, Corbyn, whose foreign policy views have led some to brand him as anti-American, had called Obama a "Pentagon president, like all the others."