<prompt> Translate the following text to EnglishKama barua hii inavyoonyesha wazi, kama Msimamizi Mkuu wa Marekani, nina uhuru mkubwa wa kufanya ukaguzi, uchunguzi, na uchunguzi wa shughuli za mamlaka ya utekelezaji ama kwa ombi la Bunge au kwa mamlaka yangu mwenyewe.  <response>: As this letter makes clear, as Comptroller General of the United States, I have broad discretion to conduct audits, investigations, and examinations of executive branch activities either at the request of Congress or on my own authority. 