Trump: 'I'm not stupid

Story highlights
Trump challenges new London mayor Sadiq
Khan to I.Q. test
Khan rebuffs offer, says "ignorance is not the
same thing as lack of intelligence"
(CNN) — Donald Trump said Monday London's
new mayor made "very rude statements" about
him -- and the presumptive Republican
presidential nominee warned he won't have a
good relationship with British Prime Minister
David Cameron if he's elected.
Trump made the comments in an interview with
ITV's "Good Morning Britain" host Piers Morgan,
when asked to respond to criticisms made about
him by British politicians.