Mitt Romney kicked off his first foreign tour with humiliation when he was rebuked by UK Prime Minister David Cameron for questioning whether Britain will be able to stage the Olympic Games effectively.

Diplomatically, the two are off to an incredibly rocky start as Romney began his London trip to meet British leaders, hold fundraisers and attend the opening ceremonies of the Olympics.

If Romney can defeat President Obama in November, he and Cameron would have strained their 'special relationship' before it even begins.

Romney, who was in charge of the 2002 Winter Olympics in Salt Lake City, caused an international stir during a Wednesday interview when he questioned London's ability to host the games, saying: 'It's hard to know just how well it will turn out.'

But on Thursday, after a morning of meetings with top British officials - including Prime Minister David Cameron - Romney made a complete about-face on his remarks, saying he believes the Olympics will be 'successful.'