Also known as:equal sovereignties · equal footing doctrine
Written by attorneys · grounded in primary & secondary sources — see below
A constitutional principle that all states possess equal sovereignty within the federal system. Congress may not subject some states but not others to special federal requirements such as preclearance without extraordinary justification tied to current conditions.
Sources & Authorities
How it applies
Common Examples
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Outdated Tech Preclearance Rule
Congress enacted a statute requiring only states with large technology hubs, identified by 1990s internet data, to obtain federal preclearance before changing online voter registration rules. Texas challenged the statute after it was forced to submit its new digital ballot system for approval while other states faced no such burden. The court invalidated the coverage formula because it relied on decades-old data without current evidence of discrimination justifying the unequal treatment.
Stale Coverage Formula Challenge
Congress renewed a statute requiring only southern states, identified by 1960s voting data, to obtain federal preclearance before changing any election rule. Alabama challenged the statute after it was forced to submit routine polling-place adjustments for approval while northern states faced no such burden. The court invalidated the coverage formula because it relied on decades-old data without current evidence of discrimination justifying the unequal treatment.
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Cases
Casebooks
Study Supplements
Disparate Bailout Provisions
Congress enacted a statute allowing only non-covered states to bail out of federal oversight via a simple declaratory judgment while covered states faced a multi-year litigation burden. A covered state challenged the statute after its request was denied despite current compliance data showing no ongoing discrimination. The court struck down the unequal bailout rules because they lacked extraordinary justification tied to present conditions.
Common questions
Frequently Asked
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What must Congress show to justify treating some states differently from others?+
Congress must supply extraordinary justification based on current conditions rather than decades-old data. Reliance on stale coverage formulas fails this test and violates equal sovereignty under the Tenth and Fifteenth Amendments.
Supporting sources
Does the equal sovereignty principle apply only to voting rights legislation?+
The principle applies whenever Congress imposes disparate burdens on states in the exercise of core sovereign functions. It is rooted in the Tenth Amendment and the constitutional structure recognizing states as coequal sovereigns.
Supporting sources
Can outdated data ever support a preclearance regime that singles out particular states?+
No. Coverage formulas frozen in time and based on conditions from the 1960s or 1970s cannot furnish the required extraordinary justification. Current evidence of ongoing discrimination is necessary to depart from equal sovereignty.
Supporting sources
570 U.S. 529, 133 S. Ct. 2612, 186 L. Ed. 2d 651 (2013)Legislation and Regulation
…current burdens and must be justified by current needs” and concluded that “a departure from the fundamental principle of equal sovereignty requires a showing that a statute’s disparate geographic coverage is sufficiently related to the problem that it targets.” 557 U. S., at 203. These basic principles guide review of the…