The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.
Both were a series of articles written under fake names to protect the writers. The viewpoint of the group, such as the federalists, who wanted a strong national government, and the antifederalists who were afraid of an imbalance of power, were presented and argued back and forth. People reading these publications had access to information that they would not have had otherwise, and therefore were influenced by the opinions of these two groups.
Because of what they had to offer
My Answer: Nixon recognized the citizen's Republic of China in an attempt to diminish the USSR's global influence.
Hope I helped! :D