Historians differ over the extent to which either resolution advocated the doctrine of nullification. Historian Lance Banning wrote, "The legislators of Kentucky (or more likely, John Breckinridge, the Kentucky legislator who sponsored the resolution) deleted Jefferson's suggestion that the rightful remedy for federal usurpation was a "nullification" of such acts by each state acting on its own to prevent their operation within its respective borders. Rather than suggesting individual, although concerted, measures of this sort, Kentucky was content to ask its sisters to unite in declarations that the acts were "void and of no force", and in "requesting their appeal" at the succeeding session of the Congress." The key sentence, and the word "nullification" was used in supplementary Resolutions passed by Kentucky in 1799.