There are two interesting and contradictory aspects of jury nullification. In most states, it is improper and subject to contempt of court for counsel for a defendant even to suggest to a jury that it is allowed to "nullify" the law by choosing not to convict. On the other hand, I have seen instances where jury nullification worked, either because a jury flatly refused to convict on clear facts, or because a prosecutor declined to bring charges on clear facts because he understood that a jury would probably throw his case out of court.
On a more practical sense, in my TV ad to attack the Campaign Finance "Reform" Act, will be a clear, facial violation of the Act. My last ditch defense, if the Federal Election Commission brings criminal charges against me, will be jury nullification. (See below.)
Congressman Billybob