Paul Alan Levy, Public Citizen reports on the threat and his response. “No rational person will believe your client participated in the creation or approval of this picture in any way.” It sounds right to me. And, “Trademark law aside, McCall’s use of the image to comment on the President …, while playing on the name of a leading grocery store chain, is speech squarely protected by the First Amendment.” This is also the case. Levy has more information.