Eric Walker added a number of topics and Ballot Battles - Hardcover - Edward Foley - Oxford University Press to Presidency of the United States, and added Presidency of the United States to Government and politics in the United States

Eric Walker added War Games: Trump, Bolton, and the Alleged March to Fight Iran | The New Yorker to National Security Presidential Memoranda 13, and added National Security Presidential Memoranda 13 to Presidential memoranda

Eric Walker added National Security Presidential Memoranda 13 to Presidential memoranda, and added Presidential memoranda to Presidency of the United States