The Americans, by their very inaction, have voided the possibility of a 2-state solution. Had the Americans acted to stop settlement activity, to which they are officially opposed, this would not be the case. Talk is cheap and the Americans have "talked the talk." The Americans are still capable of taking real action to bring about their vision of 2-states, but that is highly unlikely. In the meantime our "leaders" are setting the stage for a bi-national state.
from the article: Clinton: Two-state solution still possible for Israel, Palestinians