Romney handled these attacks well but faltered when he had to think on his feet on a few occasions, specifically when Rick Santorum challenged him on subject of felons being able to vote again after they complete their sentences and probation.

FORBES: Connect

Just as predictably, his weaknesses were stultifying rhetoric (phrases such as "net inward migration" and "proportional representation list system" abounded) and an inability to think on his feet (he struggled to respond to Mr Cameron's frequent attacks on his tax plans).

ECONOMIST: The daily take

He could think very well on his feet.

BBC: Fleming a tough act to follow

Big Bird is Big Business and Sesamenomics: Bert and Ernie weigh in on politics Even Bert and Ernie think Big Bird should stand on his own two feet.

FORBES: No, I'm not voting for Obama

With only a rough idea of who would be arriving at any given time, Omari and Sukhpeet had to think on their feet but topical questions to Giggs about his Man Utd team-mate Wayne Rooney and to former Olympic 100m champion Linford Christie about his experiences in 'I'm A Celebrity...

BBC: School Report goes backstage at Sports Personality