Historian Ron Bryant did good job outlining the history of nullification in a recent Kentucky Gazette article, but he draws several erroneous conclusions.

Portrait of Thomas Jefferson by Rembrandt Peal...

Nullification consists of any state or local action rendering an unconstitutional act null, void or simply unenforceable within that state.

As Bryant points out, nullification was first formalized by James Madison and Thomas Jefferson in the Kentucky and Virginia Resolutions of 1798. In his original draft, Jefferson asserted “where powers are assumed which have not been delegated, a nullification of the act is the rightful remedy.” Madison used different language, writing that “in case of a deliberate, palpable, and dangerous exercise of other powers, not granted by the said compact, the states who are parties thereto, have the right, and are in duty bound, to interpose for arresting the progress of the evil.”

Read the rest via No, Nullification Does Not Pose a Danger | Tenth Amendment CenterTenth Amendment Center.