Nixon

Nixon who was president at the time is believed to have singed it out of its popularity. In order to leave his mark. and make an attempt to stay in the good graces of the public. as we all know it was futile. Nixon is said to have said "Minimize these changes to the extent law allows" showing his general disproval of the law.      

(http://www.titleix.info/History/The-Living-Law.aspx)