Esmero vs. Duterte

The President is immune from suit during incumbency, and mandamus does not lie to compel the exercise of discretionary foreign affairs powers. The duty to defend national territory and determine the manner of addressing international disputes involves political judgment and executive discretion, not a ministerial act prescribed by law in a specific manner.

Petitioner Atty. Romeo M. Esmero filed a petition seeking to compel President Rodrigo Roa Duterte to take specific actions regarding Chinese incursions in the West Philippine Sea. Petitioner alleged that the President unlawfully neglected his constitutional duty to defend national territory by failing to: (1) engage in defensive war or call upon the people to defend the State; (2) invoke the Mutual Defense Agreement with the United States; (3) seek UN Security Council intervention through the Uniting for Peace Resolution; and (4) sue China before the International Court of Justice for damages.

• The Petition: Atty. Romeo M. Esmero filed a petition for mandamus against President Rodrigo Roa Duterte to compel him to defend the national territory, specifically the West Philippine Sea, against Chinese incursions.
• Specific Reliefs Sought: Petitioner sought orders compelling the President to: (a) consider engaging in defensive war and calling upon the people to defend the State; (b) invoke the Mutual Defense Agreement with the United States; (c) file a case before the UN Security Council under the Uniting for Peace Resolution of 1950 to request UN Patrol Boats to protect Filipino fishermen; and (d) sue China before the International Court of Justice to demand payment for damages for "taking" the Kalayaan Islands.
• Allegations of Neglect: Petitioner asserted that the President's public pronouncements and inaction regarding Chinese aggression constituted unlawful neglect of a ministerial duty to defend national territory, causing detriment to Filipino fishermen and violating the constitutional mandate to protect the people and their rights to national territory.
• Prior Arbitration: The decision noted that in 2013, former President Benigno S. Aquino III had initiated arbitration proceedings against China under UNCLOS, which resulted in a favorable Award on July 12, 2016. However, petitioner claimed that the current President's different approach constituted abdication of duty.

• Duty to Defend National Territory: Petitioner maintained that the Constitution imposes a prime duty on the Government to serve and protect the people and their rights, including rights to national territory, which necessarily requires aggressive defensive action against Chinese incursions.
• Ministerial Nature of the Duty: Petitioner argued that the duty to defend national territory, including the West Philippine Sea as established by the UN Arbitral Tribunal, is ministerial and specific, requiring the President to take concrete defensive actions such as seeking UN intervention and suing before the ICJ.
• Justiciability of Foreign Policy: Petitioner asserted that the President's public pronouncements and actions on the West Philippine Sea are subject to judicial review and must be exercised within constitutional limits.
• Exception to Presidential Immunity: Petitioner contended that the petition regarding the President's failure to perform duties relative to the West Philippine Sea constitutes an exception to the general rule on presidential immunity from suit.
• Inadequacy of Diplomatic Protests: Petitioner argued that filing diplomatic protests against China is insufficient and does not constitute adequate defense of national territory.

• Presidential Immunity: The President is immune from suit during incumbency regardless of the nature of the suit, as established in De Lima v. Duterte.
• Discretionary Nature of Foreign Affairs: The duty to defend national territory and conduct foreign affairs is discretionary, not ministerial, and involves political questions beyond judicial compulsion.
• Lack of Specific Legal Duty: No law specifically requires the President to file suit before the UN Security Council or ICJ, or to invoke specific defense treaties in a particular manner.

• Presidential Immunity: Whether the President is immune from suit during incumbency in a mandamus petition seeking to compel specific foreign policy actions.
• Ministerial vs. Discretionary Duty: Whether the duty to defend national territory and conduct foreign affairs is a ministerial act subject to mandamus or a discretionary function.
• Political Question: Whether the determination of how to address territorial disputes with China constitutes a political question beyond judicial review.

• Presidential Immunity: The President is immune from suit during his incumbency, regardless of the nature of the suit filed against him. The suit naming President Duterte as sole respondent should be dismissed outright.
• Ministerial vs. Discretionary Duty: Mandamus does not lie to compel the President to take specific foreign policy actions. The duty to defend national territory and conduct foreign affairs is discretionary, not ministerial. No law specifically enjoins the President to go to the UN or ICJ to sue China, or to respond to threats in a prescribed manner.
• Political Question: The decision of how best to address disputes with China rests with the political branches of government, specifically the President as the sole organ of foreign relations. While subject to constitutional limits, the choice among military, diplomatic, or legal approaches involves political judgment accountable to the people, not to judicial compulsion.

• Presidential Immunity from Suit — The President enjoys absolute immunity from suit during incumbency, regardless of the nature of the suit or the official capacity in which the act was done. This immunity extends to mandamus petitions seeking to compel the performance of official duties.
• Mandamus for Ministerial Acts — Mandamus lies only to compel the performance of a ministerial act or duty specifically enjoined by law. A ministerial act is one performed in a given state of facts in a prescribed manner without regard to the officer's judgment. It does not lie to control discretion or compel discretionary acts.
• The President as Sole Organ of Foreign Affairs — The President is the sole organ and authority in the external affairs of the country, vested with exclusive power to conduct and manage foreign relations, negotiate international agreements, and settle international disputes. This power must be exercised within constitutional parameters but involves broad discretion.
• Political Question Doctrine in Foreign Policy — The determination of how to address international disputes and threats to national territory involves political questions committed to the executive and legislative branches, not subject to judicial compulsion via mandamus.

• "The President is immune from suit during his incumbency, regardless of the nature of the suit filed against him."
• "Mandamus is used merely to compel action and to coerce the performance of a pre-existing duty; it does not lie to control discretion."
• "A purely ministerial act or duty is one which an officer or tribunal performs in a given state of facts, in a prescribed manner, in obedience to the mandate of a legal authority, without regard to or the exercise of his own judgment upon the propriety or impropriety of the act done."
• "By constitutional fiat and the intrinsic nature of his office, the President is also the sole organ and authority in the external affairs of the country."
• "Although the Chief Executive wields the exclusive authority to conduct our foreign relations, this power must still be exercised within the context and the parameters set by the Constitution, as well as by existing domestic and international laws."
• "Being the Head of State, he is free to use his own discretion in this matter, accountable only to his country in his political character and to his own conscience."
• "Ultimately, the decision of how best to address our disputes with China (be it militarily, diplomatically, legally) rests on the political branches of government."

• De Lima v. Duterte, G.R. No. 227635, 15 October 2019 — Controlling precedent establishing that the President is immune from suit during incumbency regardless of the nature of the suit.
• Saguisag v. Ochoa, Jr., 791 Phil. 277 (2016) — Controlling precedent discussing the President's exclusive power as sole organ of foreign relations and the constitutional restrictions thereon.
• De Castro v. Judicial and Bar Council, 629 Phil. 629 (2010) — Cited for the distinction between ministerial and discretionary acts.
• Marbury v. Madison, 5 U.S. 137 (1803) — Cited for the principle that the President is accountable only to the country in his political character and to his own conscience regarding discretionary acts.
• Vinuya v. Romulo, 633 Phil. 538 (2010) — Cited for the principle that foreign policy decisions rest on the political branches.

• Section 3, Rule 65 of the Rules of Court — Governs petitions for mandamus, requiring a specific legal duty resulting from office, trust, or station that has been unlawfully neglected.
• Article VII, Section 16 of the 1987 Constitution — Grants the President power to appoint ambassadors and other public ministers.
• Article VII, Section 21 of the 1987 Constitution — Grants the President power to contract or guarantee foreign loans with Monetary Board concurrence.
• Article II, Section 2 of the 1987 Constitution — Renounces war as an instrument of national policy.
• Article II, Section 7 of the 1987 Constitution — State policy to protect the people and their rights.
• Article I of the 1987 Constitution — Definition of national territory.

Chief Justice Alexander G. Gesmundo, and Associate Justices Estela M. Perlas-Bernabe, Alfredo Benjamin S. Caguioa, Ramon Paul L. Hernando, Mario V. Lopez, Edgardo L. Delos Santos, Samuel H. Gaerlan, Ricardo R. Rosario, Jhosep Y. Lopez, and Rodil V. Zalameda (ponente).
Justice Marvic M.V.F. Leonen filed a separate concurring opinion.