Author
United States. Congress. House. Committee on Foreign Affairs
Obama, Barack
25
United States. President (2009-2017 : Obama)
24
Bush, George W. 1946-
12
United States. President (2001-2009 : Bush)
12
Library of Congress. Congressional Research Service
4
United States
3
Trump, Donald, 1946-
2
United States. President (2009-2017 : Obama),
2
United States. President (2017-2021 : Trump),
2
Obama, Barack,
1
United States. Department of State
1
United States. President's Commission on Aviation Security and Terrorism
1