Mitt Romney has been trying to make light of his offer of a $10,000 bet to Texas Governor Rick Perry during a US presidential candidate's debate in Iowa.
Saturday's offer, over what Romney wrote in his book about Massachusetts' controversial healthcare law that he
helped engineer as governor, appears to have given further impetus to his detractors.
They see the multi-millionaire as a man of considerable wealth, who is out of touch with a public continuing to suffer in the middle of an economic crisis.
Al Jazeera's John Terrett reports from Washington.
Source: Al Jazeera