Made it, Mao! Top of the World?DigitalVision Vectors via Getty Images Dan Murphy, Harvard Kennedy School Which country is the greatest threat to the United States? The answer, according to a large proportion of Americans, is clear: China. Half of all Americans responding to a mid-2023 survey from the Pew Research Center cited China as the biggest risk to the U.S., with Russia trailing in second with 17%. Other surveys, such as from the Chicago Council on Global Affairs, show similar findings. Senior figures in recent U.S. administrations appear to agree with this assessment. In 2020, John Ratc…