Right to Food, "180 in favour to 1 against (United States)"

Why did the USG vote against the right to food at the United Nations, braving the embarrassment of standing literally alone against women and children? "After the vote, the representative of the United States said he was unable to support the text because he believed the attainment of the right to adequate food was a goal that should be realized progressively" (emphasis added, Sixty-third General Assembly, Third Committee, "Approves 8 Resolutions for General Assembly Adoption; Right to Food, Mercenaries, Combating Religious Defamation Among Issues," 24 November 2008)