London Daily Mail: Obama branded 'Groveller-in-Chief' after deep bow to Emperor son of Japanese ruler who authorised Pearl Harbour attack

"One post by a reader on the Los Angeles Times website read: ‘The Groveller-in-Chief strikes again.’

"Another said: 'Will this man ever stop bowing and scraping to foreign leaders?’

"White House aides said Mr Obama had been simply following protocol."