Legal Sidebari

Can Congress Limit the President’s Power to
Launch Nuclear Weapons?
November 9, 2017
Recent legislation proposed in the 115th Congress intended to limit the President’s ability to launch
nuclear weapons has prompted heightened attention on Congress’s constitutional power to control the
nuclear arsenal. As outlined in earlier CRS products, the Constitution allocates the authorities necessary to
conduct war and other military operations between Congress and the President. But the precise contours
of each branch’s respective powers have been the subject of debate since the founding era. Moreover,
courts traditionally have been reluctant to resolve wartime separation of powers disputes between the
legislative and executive branches, often dismissing these cases on jurisdictional grounds without
reaching the merits of the constitutional challenges.
Against this backdrop of uncertainty, commentators have reached dramatically differing conclusions on
the constitutionality of proposals to restrict the President’s power over the nuclear arsenal. Proponents of
congressional authority reason that Congress’s many enumerated war powers—including the power to
power “raise and support Armies” and “provide and maintain a Navy”—necessarily subsume a lesser
authority to define how the President may utilize the forces and weapons that Congress has provided. But
proponents of executive authority often argue that such restrictions would unconstitutionally infringe on
the President’s “commander in chief” power to make tactical decisions on how best to subdue an enemy.
As a matter of historical practice, Congress has used the power of the purse on several occasions to
effectively prohibit or compel the termination of military operations, or to otherwise limit the deployment
of U.S. troops (as discussed in more detail here). While the appropriations power is not unfettered, it is
likely well within Congress’s constitutional authority to end the production of nuclear weapons through
the power of the purse. Legislation that limits the President’s power to control weapons that are already in
the military arsenal, however, could implicate the complex and long-standing debate over the scope of
congressional war powers that then-Assistant Attorney General (and later-Chief Justice of the Supreme
Court) William Rehnquist once described as “the most difficult area of all of the Constitution[.]”
(A congressional distribution memorandum with citations to the material discussed in this Sidebar and a
more detailed analysis of the constitutional implications of legislation limiting the President’s power to
use nuclear weapons is available to congressional clients upon request from the author.)

Congressional Research Service
https://crsreports.congress.gov
LSB10026
CRS INSIGHT
Prepared for Members and
Committees of Congress

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Congressional Research Service
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Author Information

Stephen P. Mulligan

Legislative Attorney




Disclaimer
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LSB10026 · VERSION 2 · NEW

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