Samuel Issacharoff, whose specialty is Constitutional law, told me there is certainly no federal law or Constitutional provision establishing a universal right to make campaign contributions.

FORBES: Sorry, Keith Olbermann: NBC's Donations Rule Is Legal

Under Supreme Court precedent, a state doesn't have the power to block the enforcement of federal law inside its borders, said Joseph Thai, a constitutional law professor at the University of Oklahoma who served as law clerk to Supreme Court Justices John Paul Stevens and Byron White.

NPR: States' Rights Bills Surge In GOP States

In Minnesota they defeated a proposed constitutional amendment, modeled on federal law, that would have banned same-sex marriage in the state.

FORBES: Gay Marriage Scores Victories In All Four States That Considered It, But Tough Road Lies Ahead

Mr. McConnell, a former federal judge, is a law professor and director of the Constitutional Law Center at the Stanford Law School, and a senior fellow at the Hoover Institution.

WSJ: Michael McConnell: The Constitution and Same-Sex Marriage

Mexico, which last year made data privacy a constitutional right, is also pushing through a new federal data-privacy law.

ECONOMIST: Legal confusion on internet privacy