In response to this letter, Madison visited Jefferson at Monticello during the first week of September. Their discussion was important in that it persuaded Jefferson to depart from his radical stance on dissociation from the Union, which is expressed at the end of the excerpt above. At the very least, Virginia or Kentucky taking such a stance publicly would have justified the Federalist attacks against the secessionist tendencies of the Republicans. Madison won over Jefferson, who shortly thereafter wrote to Wilson Cary Nicholas that: "From [this position] I retreat readily, not only in deference to [Madison's] judgment but because as we should never think of separation but for repeated and enormous violations, so these, when they occur, will be cause enough of themselves." Adrienne Koch and Harry Ammon, examining Jefferson's later writing, conclude that Madison had a significant role "in softening Jefferson's more extreme views."