This document discusses the balance of power between the presidency and Congress in foreign policy from 1789 to 1945. It notes periods of presidential dominance from 1789-1929 and 1898-1945 as well as congressional dominance from 1837-1861, 1869-1897, and 1918-1936. The document also lists examples of ways the presidency and Congress interact in foreign policy, such as responses to events, negotiations, policy statements, and oversight.