It is impossible to fix this common misconception at this late date, but Mike is only the latest in the long line of those who misunderstand the three fifths rule. The ratio counting slaves as three fifths of persons was used in apportioning representatives in the House, and therefore also electoral votes. Slave owners wanted slaves counted as full persons; they would not be able to vote, of course, but their existence would amplify the political clout of their masters. Enemies of slavery at the Constitutional convention–Gouverneur Morris, Rufus King–wanted slaves counted not at all.