Last week the ratings agency Fitch warned that the Government's missing its debt target "weakens the credibility of the UK's fiscal framework, which is one of the factors supporting the [AAA] rating".
But the Chancellor, in a marked change of tone, insisted that "the credit rating is one of a number of ways in which people look at countries."
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Addressing an audience in America, the former PM said of Europe's single currency that it was not working "as intended".
The countries lawmakers voted to impeach President Park Geun-hye in the wake of mass protests against her.
The former presidential candidate, who has herself been the target of false news reports, said such stories had 'real-world consequences'.