I figured he was speakling of that, but here is the US view on jury nullification...
In the 1895 in the case of Sparf v. United States written by Justice John Marshall Harlan, the United States Supreme Court held 5 to 4 that a trial judge has no responsibility to inform the jury of the right to nullify laws. This decision, often cited, has led to a common practice by United States judges to penalize anyone who attempts to present a nullification argument to jurors and to declare a mistrial if such argument has been presented to them. In some states, jurors are likely to be struck from the panel during voir dire if they will not agree to accept as correct the rulings and instructions of the law as provided by the judge.[32]
In recent rulings, the courts have continued to prohibit informing juries about jury nullification. In a 1969, Fourth Circuit decision, U.S. v. Moylan, 417 F.2

1002 (4th Cir.1969), the Court affirmed the concept of jury nullification, but upheld the power of a court to refuse to permit an instruction to the jury to this effect.[33] In 1972, in United States v. Dougherty, 473 F.2

1113, the United States Court of Appeals for the District of Columbia Circuit issued a ruling similar to Moylan that affirmed the de facto power of a jury to nullify the law but upheld the denial of the defense's chance to instruct the jury about the power to nullify.[34]
In 1988, the Sixth Circuit upheld a jury instruction: "There is no such thing as valid jury nullification." In 1997, the Second Circuit ruled that jurors can be removed if there is evidence that they intend to nullify the law, under Federal Rules of Criminal Procedure 23(b).[35] The Supreme Court has not recently confronted the issue of jury nullification. Further, as officers of the court, attorneys have sworn an oath to uphold the law, and are ethically prohibited from directly advocating for jury nullification.[36]
From http://en.wikipedia.org/wiki/Jury_nullification