According to John Taylor at the Financial Times:
Under President Barack Obama’s budget plan, the federal debt is exploding. To be precise, it is rising – and will continue to rise – much faster than gross domestic product, a measure of America’s ability to service it. The federal debt was equivalent to 41 per cent of GDP at the end of 2008; the Congressional Budget Office projects it will increase to 82 per cent of GDP in 10 years. With no change in policy, it could hit 100 per cent of GDP in just another five years.
A government debt burden of that [100 per cent] level, if sustained, would in Standard & Poor’s view be incompatible with a triple A rating,” as the risk rating agency stated last week.