“We believe it is vitally important for the U.S. government to make good on its financial obligations and to put its fiscal house in order,” wrote the Chamber of Commerce in a letter signed by nearly 500 American CEOs that was sent to the White House and all Capitol Hill offices. “Now is the time for our political leaders to put aside partisan differences and act in the nation’s best interests. We believe our nation’s economic future is reliant upon their actions and urge them to reach an agreement.”The high-profile signers included Tom Donahue, the influential chairman of the Chamber of Commerce; Robert Koch, CEO of Koch Enterprises; and James Gorman, president of Morgan Stanley.