May 17, 2010 Anti-Americanism Politics 1

“The statute is a 'necessary and proper' means of exercising the federal authority that permits Congress to create federal criminal laws, to punish their violation, to imprison violators, to provide appropriately for those imprisoned and to maintain the security of those who are not imprisoned by who may be affected by the federal imprisonment of others,” said Justice Stephen Breyer, writing the majority opinion.

via Justices: Sex offenders can be kept in prison – Crime & courts-

They upheld an unconstitutional law.  There’s nothing in the Constitution that grants this kind of power.