Sentence:  Any sudden assent to the proposal...might possibly be considered as <WSD>committing</WSD> the faith of the United States. 
Meaning of the word marked with <WSD> tags:  To pledge or bind; to compromise, expose, or endanger by some decisive act or preliminary step. (Traditionally used only reflexively but now also without "oneself" etc.)<ref>http://muse.jhu.edu/journals/american_speech/v074/74.3shapiro.html</ref>