Given what the threat of a Greek default is doing, what would the Tea Party have done to world financial stability if they had managed to force a US default on debt?

The previously exuberant stock market, buoyed on the debt relief deal the EU leaders hammered out, is now in jeopardy because the Greek PM decided to put the plan up to a popular vote. Look at what the simple threat of a tiny nation like Greece defaulting is doing to Wall Street. Given that response, what do you think would have happened had the Tea Party freshmen in the US House of Representatives had their way, and shut down the US Government? Are you planning to reelect the people who pushed so hard for a government shutdown and default on the national debt?