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1 1 (October 13, 2021)

handle is hein.crs/goveggr0001 and id is 1 raw text is: Congressional
~ Research Service
U.S. Nuclear Weapons Policy: Considering
No First Use
Updated October 13, 2021
The Biden Administration began its Nuclear Posture Review (NPR) in July 2021 and expects to complete
the study in early 2021. The NPR is likely to include a review of U.S. declaratory policy-the statements
the United States makes about when, how, and why it might use nuclear weapons to deter adversaries and
reassure U.S. allies of its commitment to their defense-with a focus on whether the United States should
pledge never to be the first to use nuclear weapons in a conflict. President Biden has spoken, in the past,
about his support for a sole purpose policy for nuclear weapons, which some see as similar to a no first
use pledge. Some in Congress support such a pledge, but others have insisted that it would undermine
the U.S. commitment to extend deterrence to allies.
A no first use policy would represent a change from current policy, where the United States has pledged
to refrain from using nuclear weapons against most non-nuclear weapon states, but has neither ruled out
their first use in all cases nor specified the circumstances under which it would use them. This policy of
calculated ambiguity addressed U.S. concerns during the Cold War, when the United States and NATO
faced numerically superior Soviet and Warsaw Pact conventional forces in Europe. At the time, the United
States not only developed plans to use nuclear weapons on the battlefield to disrupt or defeat attacking
tanks and troops, but it also hoped that the risk of a nuclear response would deter the Soviet Union from
initiating a conventional attack. This is not because the United States believed it could defeat the Soviet
Union in a nuclear war, but because it hoped the Soviet Union would know that the use of these weapons
would likely escalate to all-out nuclear war, with both sides suffering massive destruction.
Since the end of the Cold War, the United States has modified its declaratory policy to reduce the apparent
role of nuclear weapons in U.S. national security, but has not declared that it would not use them first. In
the 2010 Nuclear Posture Review Report, the Obama Administration stated that the United States would
only consider the use of nuclear weapons in extreme circumstances and would not threaten or use
nuclear weapons, under any circumstances, against non-nuclear weapons states that are party to the
Nuclear Nonproliferation Treaty and in compliance with their nuclear non-proliferation obligations. But
the Administration was not prepared to state that the sole purpose of U.S. nuclear weapons was to deter
nuclear attack because it could envision a narrow range of contingencies where nuclear weapons might
play a role in deterring conventional, chemical, or biological attacks.
The Trump Administration, in the 2018 Nuclear Posture Review (NPR) Report, also rejected the idea that
the sole purpose of nuclear weapons is to deter nuclear attack, and, therefore, did not adopt a no first
use policy. It noted that the United States would only consider the employment of nuclear weapons in
extreme circumstances to defend the vital interests of the United States, its allies, and partners but stated
that nuclear weapons contribute to deterrence of nuclear and non-nuclear attack; assurance of allies and

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