Final answer:
Calvin Coolidge was the president associated with the Kellogg-Briand Pact and the Dawes Plan, both of which were efforts to secure peace and economic stability after World War I.
Step-by-step explanation:
The president who dealt with the Kellogg-Briand Pact and the Dawes Plan was Calvin Coolidge.
The Kellogg-Briand Pact was an international agreement that sought to prevent war by making it illegal as a tool of national policy.
It was signed in 1928 by the United States and other nations, ultimately including over sixty countries, but without a means of enforcement, it was largely symbolic.
The Dawes Plan, on the other hand, was an attempt in 1924 to solve the World War I reparations problem that Germany had to face and to stabilize the German economy.
It was formulated to ensure payments of reparations by Germany after World War I, and to ease the financial strain.