Championing states' rights isn't just for conservatives. A key tool in the fight over societal change is being used to promote medical marijuana and physician-assisted suicide. The line between what should be under federal control and what shouldn't is under new debate.
Marci Hamilton, public law chair, Benjamin N. Cardozo School of Law in New York; visiting scholar, Princeton Theological Seminary
Jim Holt, contributor, New York Times Magazine, The New Yorker
Michelle Goldberg, writer, Salon.com