	Introduction

The United States was the driving proponent of NATO's creation in 1949 and has been the unquestioned leader of the alliance as it has evolved from a regionally focused collective defense organization of 12 members to a globally engaged security organization of 29 members. Administrations have viewed U.S. leadership of NATO as a cornerstone of U.S. national security strategy, bringing benefits ranging from peace and stability in Europe to the political and military support of 28 allies, including many of the world's most advanced militaries. One chief concern of critics in the United States, including some Members of Congress, has been that European allies' reliance on U.S. security guarantees have fostered an imbalanced and unsustainable "burdensharing" arrangement by which the United States carries an unfair share of the responsibility for ensuring European security. President Donald Trump has amplified these concerns, and his assertions that NATO is a "bad deal" have caused some analysts and policymakers to reassess the costs and benefits to the United States of its long-standing leadership of the alliance. Although successive U.S. presidents have called on the allies to increase defense spending, none has done so as stridently as President Trump. President Trump's supporters, including some Members of Congress, also argue that Trump's forceful statements have succeeded in securing defense spending increases across the alliance that were not forthcoming under his predecessors. 4). These include, but are not limited to, the following:
Peace, stability, conflict prevention, and deterrence . An u nrivaled platform for constructing and operating international military coalitions. U.S. military bases in strategically important locations. Economic stability. Heightened risks to U.S. forces. Continued European dependence. Provoking Russia . A negative b udgetary impact. Considerations for Congress

Congress was instrumental in creating NATO in 1949 and has played a critical role in shaping U.S. policy toward the alliance ever since. While many Members of Congress have criticized specific developments within NATO—regarding burdensharing, for example—Congress as a whole has consistently demonstrated strong bipartisan support for active U.S. leadership of and support for NATO. During the Trump Administration, however, demonstrations of congressional support for NATO have at times been viewed more as an effort to reassure allies about the U.S. commitment to NATO after President Trump's criticisms of the alliance. Trump Administration officials stress that the Administration remains strongly committed to NATO and to European security (as articulated in the National Security and Defense strategies), and Congress has supported the Administration's requests to increase funding for key U.S. defense activities in Europe such as the European Deterrence Initiative. Nevertheless, during the Trump Administration both chambers of Congress have passed legislation expressly reaffirming U.S. support for NATO at times when some allies have questioned the President's commitment. This includes legislation passed by the House in January 2019 ( H.R. 676 , see below) seeking to limit the president's ability to unilaterally withdraw from NATO; similar legislation has been introduced in the Senate (S.J.Res. 4). Some analysts portrayed House Speaker Nancy Pelosi and Senate Majority Leader Mitch McConnell's joint invitation to NATO Secretary General Jens Stoltenberg to address a joint session of Congress on April 3, 2019, in commemoration of NATO's 70 th anniversary as an additional demonstration of NATO's importance to the Congress. 5515 / P.L. H.Res. H.R. These might include the following: 
addressing the strategic value of NATO to the United States and the leadership role of the United States within NATO; examining whether the alliance should adopt a new strategic concept that better reflects views of the security threat posed by Russia and new and emerging threats in the cyber and hybrid warfare domains (NATO's current strategic concept was adopted in 2010); examining NATO's capacity and willingness to address other security threats to the Euro-Atlantic region, including from the Middle East and North Africa, posed by challenges such as terrorism and migration; examining the possible consequences of member states' failure to meet agreed defense spending targets; assessing U.S. force posture in Europe and the willingness of European allies to contribute to NATO deterrence efforts and U.S. defense initiatives in Europe such as the ballistic missile defense program and EDI; revisiting the allies' commitment to NATO's stated "open door" policy on enlargement, especially with respect to the membership aspirations of Georgia and Ukraine; and developing a NATO strategy toward China, particularly given U.S. and other allies' concerns about the security ramifications of increased Chinese investment in Europe.
On April 4, 2019, foreign ministers from the 29 member states of the North Atlantic Treaty Organization (NATO) are to gather in Washington, DC, to mark the 70th anniversary of the North Atlantic Treaty (also known as the Washington Treaty). NATO Secretary General Jens Stoltenberg is to address a joint session of Congress on April 3, 2019, the first ever to do so. Congress was instrumental in creating NATO in 1949 and has played a critical role in shaping U.S. policy toward the alliance ever since.
A key goal of the 70th anniversary meeting will be to highlight NATO's past successes and present a unified vision for its future. The United States was the driving proponent of NATO's creation and has been the unquestioned leader of the alliance as it has evolved from a collective defense organization of 12 members focused on deterring the Soviet Union to a globally engaged security organization of 29 members. Successive U.S. Administrations have viewed U.S. leadership of NATO as a cornerstone of U.S. national security strategy. Proponents of NATO cite numerous benefits to the United States, including
peace, stability, conflict prevention, and deterrence in Europe; treaty-based defense and security support from 28 allies, including many of the world's most advanced militaries; an unrivaled platform for constructing and operating international military coalitions; U.S. military bases in strategically important locations; and economic stability in the world's largest trade and investment marketplace.
On the other hand, NATO's critics argue that European reliance on U.S. security guarantees have fostered an imbalanced and unsustainable "burdensharing" arrangement by which the United States carries an unfair share of the responsibility for ensuring European security. Critics cite the following costs to the United States of its leadership of NATO:
loss of autonomy; heightened risks to U.S. forces; continued European military dependence on the United States; provoking Russia; and a negative budgetary impact.
The anniversary meeting comes at a tense time for NATO, as the allies have struggled to present a unified response to vocal criticism from U.S. President Donald Trump. President Trump has admonished European allies for failing to meet agreed NATO defense spending targets and has repeatedly questioned NATO's value to the United States. Although he is not the first U.S. president to press the allies to increase defense spending, none has done so as stridently and none has called into question the U.S. commitment to NATO as openly or to the same extent as Trump. The President's criticisms have provoked mixed reactions in the United States, with NATO supporters, including many Members of Congress, reaffirming the U.S. commitment to NATO, and others reevaluating the costs and benefits of long-standing U.S. leadership of the alliance.
Trump Administration officials stress that they remain committed to NATO and to upholding European security. They underscore that Congress has supported the Administration's requests to increase funding for U.S. defense activities in Europe such as the European Deterrence Initiative. President Trump's supporters also argue that his forceful statements have succeeded in securing defense spending increases by European allies that were not forthcoming under his predecessors.
While many Members of Congress have criticized specific developments within NATO—regarding burdensharing, for example—Congress as a whole has demonstrated consistent bipartisan support for NATO. During the Trump Administration, congressional support has at times been viewed as an effort to reassure allies troubled by President Trump's criticisms of the alliance. During the Trump Administration, both chambers of Congress have passed legislation expressly reaffirming U.S. support (H.Res. 397; H.R. 5515/P.L. 115-232; H.Res. 256), including legislation passed by the House in January 2019 (H.R. 676) seeking to limit the president's ability to withdraw from NATO unilaterally (similar legislation, S.J.Res. 4, has been introduced in the Senate). Some analysts portrayed the bipartisan House-Senate invitation to Secretary General Stoltenberg to address a joint session as an additional demonstration of NATO's importance to the Congress.