These people were members of the U.S. Senate's Committee on Foreign Relations.
The United States Senate Committee on Foreign Relations is a standing committee of the United States Senate. It is charged with leading foreign-policy legislation and debate in the Senate. The Foreign Relations Committee is generally responsible for overseeing (but not administering) and funding foreign aid programs as well as funding, arms sales and training for national allies. The committee is also responsible for holding confirmation hearings for the position of Secretary of State. The Committee was created in 1816. Its sister committee in the House of Representatives is the Committee on Foreign Relations.