The Vietnam War was unpopular with many Americans for all of the following reasons except that __________.

Nixon did not refuse to expand the war into Cambodia; in 1970, he ordered U.S. troops into Cambodia, a move that sparked widespread protests. The other choices describe factors that contributed to opposition to the war: Congress had not formally declared war, young men faced the draft, and the military struggled to show progress against guerrilla tactics. Therefore, “Nixon refused to expand the war into Cambodia” is the exception.

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