"The bigger problem is it doesn't appear to me at least that the Greek people have the appetite to follow through on the austerity measures."
In late trading in New York, the Dow Jones Industrial Average dropped 1.32 per cent, the Standard & Poor's 500 Index shed 1.34 per cent and the Nasdaq Composite Index fell 0.81 per cent.
In Europe, the benchmark Stoxx 600 Index ended the day with a 2.3 per cent drop.
The euro was hit, too, as the currency last traded 1.2 per cent weaker at US$1.3634. The euro was likely to test last week's seven-month low of US$1.3495 again soon, traders told Reuters.
Underpinning a fiscal crisis in the US was President Barack Obama's US$3 trillion plan to lower US deficits by raising taxes on the rich.
The proposal failed, not surprisingly, to draw support from Republicans who labelled it a political stunt with little chance of becoming law. Obama made it clear though that he won't sign any bill to cut the deficit unless it contains tax increases.
Meanwhile, Federal Reserve policy makers are gearing up to debate the world's largest economy at a two-day meeting beginning Tuesday.
Amid the turmoil investors sought the relative safety of US Treasuries. Yields on 10-year notes dropped 12 basis points to 1.93 per cent at 1.58pm in New York, according to Bloomberg Bond Trader prices.
"Policy makers are unable or unwilling to do anything," David Ader, head of US government bond strategy at CRT Capital Group LLC in Stamford, Connecticut, referring to European officials, told Bloomberg News. "That is why people are buying two-year notes at 15 basis points even when they know the risk is we're going to see the Fed in here selling them."
Even gold, typically a safe-haven, fell, with gold futures for December delivery shedding 2.2 per cent to US$1,774.70 an ounce on the Comex in New York.
Others remain optimistic about the precious metal. Gold may climb 21 per cent to a record US$2,200 an ounce by the end of 2011, Tony Hall, the London-based chief investment officer of Duet Commodities Fund Ltd., told Bloomberg.