The naysayer was not the United States, which has said it will veto any resolution proposing U.N. membership for Palestine.
Rather, denying "the concurring votes of the permanent members" on which Article 27(2) of the U.N. Charter conditions resolutions were other members of the P-5; namely, China and Russia.
Thus failed a draft resolution condemning the government of Syria for its continuing bloody crackdown on its own people. (IntLawGrrls' Syria posts here; Opinio Juris on the veto here.)
Reacting harshly was Ambassador Susan E. Rice, U.S. Permanent Representative to the United Nations. Rice delivered the statement depicted below, scathing the Council's collective refusal to pass what she called "even a watered-down resolution," and then "storm[ed] out" of the Council chamber.
(credit for video clip courtesy of the Guardian)