Cite as: 570 U. S. ____ (2013)
9
Opinion of the Court
II
In Northwest Austin, we stated that “the Act imposes
current burdens and must be justified by current needs.”
557 U. S., at 203. And we 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.” Ibid. These basic principles guide our review of
the question before us.1
A
The Constitution and laws of the United States are “the
supreme Law of the Land.” U. S. Const., Art. VI, cl. 2.
State legislation may not contravene federal law. The
Federal Government does not, however, have a general
right to review and veto state enactments before they go
into effect. A proposal to grant such authority to “negative” state laws was considered at the Constitutional
Convention, but rejected in favor of allowing state laws to
take effect, subject to later challenge under the Supremacy
Clause. See 1 Records of the Federal Convention of 1787,
pp. 21, 164–168 (M. Farrand ed. 1911); 2 id., at 27–29,
390–392.
Outside the strictures of the Supremacy Clause, States
retain broad autonomy in structuring their governments
and pursuing legislative objectives. Indeed, the Constitution provides that all powers not specifically granted to the
Federal Government are reserved to the States or citizens.
Amdt. 10. This “allocation of powers in our federal system
preserves the integrity, dignity, and residual sovereignty
of the States.” Bond v. United States, 564 U. S. ___, ___
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1 Both the Fourteenth and Fifteenth Amendments were at issue in
Northwest Austin, see Juris. Statement i, and Brief for Federal Appellee 29–30, in Northwest Austin Municipal Util. Dist. No. One v. Holder,
O. T. 2008, No. 08–322, and accordingly Northwest Austin guides our
review under both Amendments in this case.