Answer: it has a strong effect. The president and the Congress experience a kind of honeymoon if the popularity of the president is high after the election. The so called "honeymoon" period can be very productive.
Explanation: When a president's popularity tends to be highest right after an election. The president's love affair with the people and with Congress can be consummated. Franklin Delano Roosvelt enjoyed a honeymoon in his first 100 days. From March to June 1933, FDR obtained from a willing Congress a vast array of new laws creating new agencies and authorizing new powers. But that was also because America was in one of the worst depressions ever.
East and West Berlin were separated by the "Berlin Wall" during that Cold War that existed between the United States and Soviet Russia, since this was meant to keep people in East Berlin from fleeing to the western half.
