<prompt> Translate the following text to EnglishOfisi ya Uhasibu Mkuu GAO ni tawi la uchunguzi la Bunge la Marekani, na linaundwa kusaidia Bunge la Marekani kutimiza majukumu yake ya kikatiba na kusaidia kuboresha utendaji na uwajibikaji wa serikali ya shirikisho kwa watu wa Marekani.  <response>: The General Accounting Office, the investigative arm of Congress, exists to support Congress in meeting its constitutional responsibilities and to help improve the performance and accountability of the federal government for the American people. 