ITV News' Libby Wiener reports from Sao Paulo in Brazil where Prime Minister David Cameron is on a two-day visit.
The Conservative, who appeared on America's Late Show with David Letterman on Wednesday night, was quizzed by the veteran host over his knowledge of British history.
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"Corbyn himself has said he was a 200-1 outsider for the Labour leadership in 2015 and look where that one went," the PM told supporters.
A father filmed himself killing his baby daughter and posted the video clips on Facebook, before committing suicide, Thai police have said.
The MEP predicted many more could withdraw support for party leader Paul Nuttall as he hit out at the newly unveiled integration policies.