In the early days of the United States, the central government was weak compared to the state governments. The leaders recognized there were problems with this arrangement. When they wrote the Constitution, they gave more power to the central government. The states still have authority within their borders but must follow the Constitution and its laws. Which system of government does the United States have?

Two gymnastics teams are intense rivals. the first team has started recruiting new gymnasts from different cities and even foreign countries in an effort to build a stronger team. after learning this, the second team begins its own recruitment campaign to find even better gymnasts. over a period of months, each team recruits dozens of players, each time trying to find a better recruit than its rival's most recent addition. which idea from the cold war is most similar to this scenario?