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Congressional Research Se
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                                                                                                 December  20, 2024

Congress and National Security: Selected Tools and Issues for

the 119th Congress


The Constitution divides national security powers between
the legislative and executive branches of the U.S.
government. Both the President and Congress may take
initiative in developing and shaping U.S. national security
policies. Interactions between the branches help determine
the direction of U.S. policies and define the resources,
constraints, and political dynamics that influence
implementation. U.S. foreign policymaking is an iterative
process with many inputs. Policies, authorities, and
appropriations respond to events abroad and domestic
circumstances. When the executive branch takes initiative
in policymaking, Congress may support executive
proposals or seek to amend or reverse them. When
Members  of Congress propose and seek to advance
policies, the executive branch may seek to endorse or
oppose them formally or informally, help to shape them, or
exercise discretion in implementing them.
Given this interconnected nature of foreign policy and
national security issues, the 119th Congress and the
incoming presidential administration may face questions
about what U.S. national security priorities and interests
are, whether and how to advance and protect them, how to
provide for and administer public resources in pursuing
them, and how to engage with partners, allies, and
adversaries abroad in safeguarding or advancing them.
Members  may  consider questions about resources,
authorities, and oversight in a context shaped by ongoing
domestic debates over the U.S. role in the world,
involvement in international crises and events, approaches
to border security and immigration, and federal spending.
Components of Nationa Security 
In some contexts, the term national security may refer to
diplomatic, military, and intelligence matters, particularly at
the nation-state level. In other contexts, it may refer more
broadly also to elements including, for example, border
security and immigration, climate impacts,
counterterrorism, critical infrastructure, critical minerals,
cyber-security, the economy, emerging technologies (e.g.,
artificial intelligence, autonomous systems, biotechnology,
and quantum  technology), energy security, global public
health, human rights, industrial base issues, information and
communications  technology, international trade and
finance, supply chain security, and transnational crime.
Members  may  consider the way participants in a given
discussion appear to be using the term. This CRS
publication does not rely on or favor a single usage.
Discussions about U.S. national security priorities and
strategy are occurring amidst debates in the United States
over the U.S. role in the world. Major questions in this
debate include, for example:


(1) Should the United States pursue global leadership and
engagement?  Should the U.S. role be more restrained?
(2) Should the United States promote alliances as a key
feature of U.S. national security strategy, or employ a more
unilateralist approach? What relative contributions should
allies and partners make to joint efforts?
(3) Should national security policy equally prioritize
Europe, the Middle East, and East Asia as key regions,
adopt what some term an Asia-first or China-first
approach, or focus on goals in Europe or the Middle East?
(4) How  should policymakers address crises and trends in
Africa, South Asia, and the Americas?
Legislative Branch   National  Security Tools
In fulfilling their constitutional responsibilities and
contributing to the development of U.S. national security
policies, Members may use a range of tools and approaches.
These tools include formal and informal activities of a
directive or advisory nature such as:
Appropriations  and Authorizations. Consideration of
              for foreign operations, defense, intelligence,
and homeland  security, and authorization of bills such as
the National Defense Authorization Act provide Congress
with regular opportunities to shape national security policy
through legislation, hearings, markups, and amendments.
Congress uses such legislation to provide    and
tools to the executive branch to implement policy or, at
times, to prohibit or otherwise   the President's freedom
of action. Funding directives, prohibitions, or conditions set
by Congress are illustrations of the
under the Constitution. In some cases, legislative-executive
              have occurred when Congress has restricted
funding        the President's opposition.
Legislative Review and Policy Oversight. Congress
conducts          of executive branch actions and program
implementation through hearings, investigations, meetings,
and requests for specific information. For example, current
law directs the executive branch to provide advance
notifications related to many foreign and security
programs and           for legislative review. Reporting
requirements may direct the executive branch to provide
information or forward-looking strategies, such as the
National Security Strategy (             ). Using
information provided in these and other notifications,
certifications, or required reports, Congress may choose to
take legislative action. Hearings and investigations may
cover any subject within a committee's jurisdiction and
may  raise policy questions publicly.
Under the              of the Constitution, the President
has the authority to make treaties, and the Senate may

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