Also known as: equal sovereignty principle · principle of equal sovereignty · equal sovereignty
Written by attorneys · grounded in primary & secondary sources — see below
A constitutional principle holding that all states possess equal sovereignty within the federal system. Any federal statute that subjects some states but not others to special regulatory burdens must rest on extraordinary justification tied to current conditions rather than outdated data.
Congress enacts a statute requiring only states identified by 1990s internet adoption data to obtain federal preclearance before altering online voter registration rules. The State of Texas sues, arguing the coverage formula treats states unequally. The court invalidates the statute because the formula relies on decades-old information without current evidence of discrimination justifying the disparate treatment.
Congress passes a tax statute imposing special reporting requirements only on states with outdated 1980s economic data showing high unemployment. The State of Nevada challenges the law. The court strikes it down for lacking extraordinary justification based on current conditions, violating the fundamental principle of equal sovereignty.
Select any source to read its text and confirm it supports the definition.
A federal education statute requires only certain states identified by 1970s census figures to comply with additional oversight. Several affected states sue the Department of Education. The court holds the statute invalid because it fails to tie the differential treatment to present-day evidence as required by equal sovereignty.
Congress must supply extraordinary justification tied to current conditions. Reliance on decades-old data fails this test and violates the principle of equal sovereignty among the states.
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No. Distinctions can be justified when a statute's disparate geographic coverage is sufficiently related to the problem it targets and rests on current evidence rather than stale historical data.
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An outdated formula imposes unequal federal oversight on selected states without demonstrating that current conditions in those states warrant special treatment. This departs from the baseline that all states enjoy equal sovereignty.
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The Tenth Amendment reserves to the states powers not delegated to the federal government. When Congress singles out particular states for differential treatment in core sovereign functions such as regulating elections, it must justify the departure from equal sovereignty with current, extraordinary justification.
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…the Voting Rights Act “imposes 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…