On May 21, 2020, U.S. Secretary of State Mike Pompeo announced that the United States would withdraw from the Treaty on Open Skies. The treaty, which has been ratified by several former Soviet Republics and most North Atlantic Treaty Organization (NATO) members, allows states parties to conduct observation flights over each other's territory to build trust and transparency with respect to arms control. The treaty gives state parties a right to withdraw upon six months of notice, which Pompeo stated would be formally given by the United States on May 22. Pompeo described the U.S. withdrawal as a response to Russian violations of the treaty and held open the possibility that the United States would rescind its notice of withdrawal in the event of full Russian compliance. U.S. allies in Europe reaffirmed their own commitment to the treaty and to working with Russia over disputes arising from it. The announced U.S. withdrawal raises significant issues of U.S. domestic law, as the Trump administration did not comply with preconditions to withdrawal that had been established by Congress in the National Defense Authorization Act for Fiscal Year 2020.
The impetus behind the Treaty on Open Skies, commonly known as the Open Skies Treaty, originated with President Eisenhower.Footnote 1 His proposal sought to ease tensions between the United States and the Soviet Union by allowing the two countries to conduct observation flights over each other's territories, thus minimizing the opportunity for either country to launch surprise military attacks against the other.Footnote 2 The Soviet Union rejected Eisenhower's proposal, but President George H.W. Bush successfully restarted negotiations in 1989.Footnote 3 The Open Skies Treaty entered into force on January 1, 2002, almost a decade after the United States, Russia, and twenty-two other countries signed it on March 24, 1992.Footnote 4 The treaty aims to “improve openness and transparency, to facilitate the monitoring of compliance with existing or future arms control agreements and to strengthen the capacity for conflict prevention and crisis management.”Footnote 5 Under the Open Skies Treaty, parties can conduct a predetermined number of observation flights over other parties’ territories, and they must also accept a certain number of flights from other parties.Footnote 6 Each party has a right to withdraw from the treaty, but it must “provide notice of its decision to withdraw to either Depositary at least six months in advance of the date of its intended withdrawal and to all other States Parties.”Footnote 7
Secretary of State Mike Pompeo announced on May 21, 2020, that the United States would withdraw from the Open Skies Treaty, remarking that a formal notice of withdrawal would be submitted the following day.Footnote 8 Pompeo stated in part:
While the United States along with our Allies and partners that are State Parties to the Treaty have lived up to our commitments and obligations under the Treaty, Russia has flagrantly and continually violated the Treaty in various ways for years. This is not a story exclusive to just the Treaty on Open Skies, unfortunately, for Russia has been a serial violator of many of its arms control obligations and commitments. Despite the Open Skies Treaty's aspirations to build confidence and trust by demonstrating through unrestricted overflights that no party has anything to hide, Russia has consistently acted as if it were free to turn its obligations off and on at will, unlawfully denying or restricting Open Skies observation flights whenever it desires.
Russia has refused access to observation flights within a 10-kilometer corridor along its border with the Russian-occupied Georgian regions of Abkhazia and South Ossetia, thereby attempting to advance false Russian claims that these occupied territories are independent states. Russia's designation of an Open Skies refueling airfield in Crimea, Ukraine, is similarly an attempt to advance its claim of purported annexation of the peninsula, which the United States does not and will never accept. Russia has also illegally placed a restriction on flight distance over Kaliningrad, despite the fact that this enclave has become the location of a significant military build-up that Russian officials have suggested includes short-range nuclear-tipped missiles targeting NATO. In 2019, Russia unjustifiably denied a shared United States and Canada observation flight over a large Russian military exercise.Footnote 9
Pompeo also asserted that Russia has “weaponized the Treaty by making it into a tool of intimidation and threat,” alleging that Russia had been undertaking observation flights to map out areas in the United States and Europe for targeting in potential military campaigns.Footnote 10 Noting that U.S. allies “still find value in the Treaty,” he rejected remaining in the treaty “in order to maintain an empty façade of cooperation with Moscow.”Footnote 11
Pompeo expressly mentioned the possibility that the United States might change course and remain in the Open Skies Treaty, should Russia “demonstrate[] a return to full compliance with this confidence-building Treaty.”Footnote 12 In a brief exchange with reporters that same day, President Trump similarly observed that “until they adhere, we will pull out” but that “there's a very good chance we'll make a new agreement or do something to put that agreement back together.”Footnote 13 Nonetheless, White House aides have indicated that the United States is unlikely to reconsider its planned withdrawal.Footnote 14
After Pompeo's announcement, twelve European countries issued a joint statement expressing regret over the U.S. decision.Footnote 15 The countries acknowledged sharing U.S. “concerns about implementation of the Treaty clauses by Russia,” but reaffirmed their commitment to the Open Skies Treaty as “functioning and useful.”Footnote 16 NATO Secretary General Jens Stoltenberg issued a statement observing that the United States had left the door open to revisiting its decision and that “NATO Allies and partner nations have engaged with Russia . . . to seek Russia's return to compliance at the earliest date possible.”Footnote 17 German Foreign Minister Heiko Maas issued a separate statement criticizing the U.S. decision and urging the United States to reconsider.Footnote 18 Maas stated that the concerns raised about Russian compliance do not warrant U.S. withdrawal, a view he and the foreign ministers of “France, Poland and the UK have repeatedly informed US Secretary of State Pompeo.”Footnote 19 The Russian deputy minister of foreign affairs denied U.S. allegations that Russia had violated the Treaty and characterized the dispute as stemming from the Trump administration's misrepresentation of “technical issues” as treaty violations.Footnote 20
On July 6, 2020, a Conference of the Parties met virtually for “extensive discussions, which offered a broad range of views” related to the effects of a U.S. withdrawal.Footnote 21 This gathering was convened by Canada and Hungary, the depositories for the Open Skies Treaty, who have a joint obligation under the treaty to convene such a conference between thirty and sixty days of receiving a notice of withdrawal.Footnote 22
In addition to prompting international debate, the Trump administration's decision to give notice of withdrawal presents significant issues as a matter of U.S. domestic law. The United States joined the Open Skies Treaty pursuant to the process set forth in Article II of the U.S. Constitution, with the Senate advising and consenting in 1993 to U.S. participation in the treaty.Footnote 23 It has become “established practice” that presidents may unilaterally withdraw the United States from Article II treaties, provided the withdrawal is consistent with international law.Footnote 24 But historical practice “does not establish that this [unilateral power] is an exclusive presidential power,” and withdrawal could “possibly [be limited] by Congress through statute.”Footnote 25
In 2019, Congress passed a statutory provision that requires the executive branch to notify Congress at least 120 days before submitting a formal notice of withdrawal from the Open Skies Treaty. Section 1234 of National Defense Authorization Act for Fiscal Year 2020 states:
(a) NOTIFICATION REQUIRED.—Not later than 120 days before the provision of notice of intent to withdraw the United States from the Open Skies Treaty to either treaty depository pursuant to Article XV of the Treaty, the Secretary of Defense and the Secretary of State shall jointly submit to the congressional defense committees, the Committee on Foreign Affairs of the House of Representatives, and the Committee on Foreign Relations of the Senate a notification that—
(1) such withdrawal is in the best interests of the United States national security; and
(2) the other state parties to the Treaty have been consulted with respect to such withdrawal.Footnote 26
Prior to the enactment of this statutory provision, and also in a presidential signing statement, the Trump administration signaled that it would not view this provision as a constitutional limit on presidential power.Footnote 27
The Trump administration did not provide Congress with notification pursuant to Section 1234(a) before giving notice of the U.S. withdrawal from the Open Skies Treaty.Footnote 28 It thus ignored the additional four-month period that the statute sought to embed into the withdrawal process—and, in the process, the administration ensured that withdrawal would be complete before the start of the next U.S. presidential term in January of 2021. In a letter to Pompeo on May 28, 2020, the House Foreign Affairs Committee “strongly condemn[ed] the Administration's decision to submit the notice of intent to withdraw from the Open Skies Treaty” and objected to its “violation of the law under section 1234 of the Fiscal Year 2020 National Defense Authorization Act.”Footnote 29 The letter observed:
[W]e reject the Administration's claim that the Constitution entitles the President to violate statutory law by refusing to submit advance notification of this withdrawal to Congress. The House and Senate rejected this claim of unchecked executive authority through bipartisan passage of section 1234 . . . . With the passage of this law, Congress made clear that it would need adequate notice of withdrawal from this longstanding treaty to effectively carry out its responsibilities under Article I of the Constitution. The Administration's lack of transparency with Congress only underscores the degree to which the withdrawal decision was poorly considered and detrimental to our interests.Footnote 30
It remains to be seen whether this conflict between Congress and the Trump administration will result in litigation or other further action.Footnote 31
Aside from the Open Skies Treaty, Trump has already withdrawn the United States from numerous international commitments, including, with respect to arms control, the Joint Comprehensive Plan of Action and the Intermediate-Range Nuclear Forces Treaty.Footnote 32 These withdrawals also make it doubtful that the administration will renew the New Strategic Arms Reduction Treaty (New START), a treaty that sets limits on the maximum number of nuclear arms the United States and Russia can maintain and that expires on February 5, 2021.Footnote 33