According to the Mail on Sunday (so it must be true):
A US source told The Mail on Sunday: "Mr Straw's views did not find favour in the White House and its concerns were passed on to the British Government."
It was revealed last week by a senior aide to media mogul Rupert Murdoch that US Secretary of State Condoleezza Rice was shocked to learn of the influence of Muslims in Mr Straw's constituency when she visited Blackburn with him during a tour of Britain in April.
Four weeks after her visit, Mr Straw was mysteriously fired...
"The Bush team worried about the problems a British Foreign Minister faced when he depended for office on an electorate with a heavy Muslim component - something Rice noticed on her visit," said Mr Stelzer.