www.theeverlastinggopstoppers.com/2014/09/iowa-republican-mangles-constitution-peddles-conspiracy-theories-senate-race/
"Nonetheless, “nullification” has been raised as a legal fantasy on the right in several episodes of American history. Most notably, it was raised as states wrestled with the enforcement of fugitive slave laws in the run-up to the Civil War, and it was raised in challenge to the desegregation of schools following Brown v. Board of Education. Perhaps unsurprisingly, it has come back into vogue in the Tea Party’s echo chamber, particularly in opposition to The Affordable Care Act."
