The United States Department of the Treasury, which had first called S&P's attention to its $2 trillion error in calculating the ten-year deficit reduction under the Budget Control Act, commented, "The magnitude of this mistake – and the haste with which S&P changed its principal rationale for action when presented with this error – raise fundamental questions about the credibility and integrity of S&P’s ratings action." The following day, S&P acknowledged in writing the US$2 trillion error in its calculations, saying the error "had no impact on the rating decision" and adding: