It's all about power. National power. State power. Concurrent power. Together they make up the swinging seesaw of Federalism. It's a constant battle for dominance between the federal and state governments, and the Standard Deviants show you the winds of change that have blown back and forth through our country's history.

Co-written by Larry Sabato, Ph.D. of University of Virginia and Jerry Manheim, Ph.D. of George Mason University