From Jack Johnson to Eliot Spitzer

"When a self-righteous crusader like Eliot Spitzer is caught with his pants down, a lot of onlookers might feel a tinge of glee to see such hypocrisy revealed. But the law under which he may be prosecuted, the Mann Act, is a relic that should give pause to anyone looking to hold Spitzer accountable in court on counts of prostitution." The century-old federalization of vice crimes.