Circular Flow of Economic Activity. The circular flow of economic activity is a model showing the basic economic relationships within a market economy. It illustrates the balance between injections and leakages in our economy. Half of the model includes injections, and half of the model includes leakages.
The President of the Senate is the presiding officer of the Senate of Nigeria, elected by its membership. The current President of the Senate is Dr. Bukola Saraki, who represents Kwara State for the APC.
Since the question is most powerful PERSON, rather than most powerful Senator. According to the Constitution the President of the Senate, ex officio, also serving as Vice President, is the highest ranking officer of the Senate. Joe Biden. 2nd most powerful person, most powerful Senator, is President pro tempore, Robert Byrd. Also 3rd in line, behind VP and Speaker of the House, for the Presidency.