Cite as: 523 U. S. 224 (1998)
Opinion of the Court
not gravely doubt the statute's constitutionality in this respect is a crucial point. That is because the "constitutional doubt" doctrine does not apply mechanically whenever there arises a significant constitutional question the answer to which is not obvious. And precedent makes clear that the Court need not apply (for it has not always applied) the doctrine in circumstances similar to those here—where a constitutional question, while lacking an obvious answer, does not lead a majority gravely to doubt that the statute is constitutional. See, e. g., Rust, 500 U. S., at 190-191 (declining to apply doctrine although petitioner's constitutional claims not "without some force"); id., at 204-207 (Blackmun, J., dissenting); United States v. Monsanto, 491 U. S. 600, 611 (1989); id., at 636 (Blackmun, J., dissenting); United States v. Locke, 471 U. S. 84, 95 (1985); id., at 120 (Stevens, J., dissenting).
III
Invoking several of the Court's precedents, petitioner claims that the Constitution requires Congress to treat recidivism as an element of the offense—irrespective of Congress' contrary intent. Moreover, petitioner says, that requirement carries with it three subsidiary requirements that the Constitution mandates in respect to ordinary, legislatively intended, elements of crimes. The indictment must state the "element." See, e. g., Hamling v. United States, 418 U. S., at 117. The Government must prove that "element" to a jury. See, e. g., Duncan v. Louisiana, 391 U. S. 145, 149 (1968). And the Government must prove the "element" beyond a reasonable doubt. See, e. g., Patterson v. New York, 432 U. S. 197, 210 (1977). We cannot find sufficient support, however, in our precedents or elsewhere, for petitioner's claim.
This Court has explicitly held that the Constitution's Due Process Clause "protects the accused against conviction except upon proof beyond a reasonable doubt of every fact necessary to constitute the crime with which he is charged."
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