know you can't ask.
"The ethical issues and problems of gifts to public officials may arise because of the tacit or subtle influence or feelings of gratitude and appreciation that a public official may feel towards his or her benefactors that might “sway his decisions” and erode the official’s “sense of mission to the public” in favor
of loyalty to “his private benefactors and patrons.” This concern, of course, must be balanced to some extent with the normal, expected and innocent expressions of gratitude from the public, the realities of friendships and personal relationships, as well as the requirements of protocol and etiquette in an officer’s official and ceremonial duties and functions. With respect to the President, the exigencies of the office and considerations of protocol, courtesy and etiquette, have led to an express exemption from the general limitation on the acceptance of private gifts which might apply to other officers and employees in the executive branch of the United States Government."
http://www.congressionalresearch.com/RS20805/document.php