He was referring to presidential term limits.
If once elected, and at a second of third election outvoted by one or two votes, he will pretend false votes, foul play, hold possession of the reins of government, be supported by the states for voting for him, especially if they are the central ones lying in a compact body themselves and separating their opponents; and they will be aided by one nation of Europe than ever the election of a king of Poland was. Reflect on all the instances in history ancient and modern, of elective monarchies, and say if they do not give foundation for my fears, the Roman emperors, the popes, while they were of any importance, the German emperors till they became hereditary in practice, the kings of Poland, the Days of the Ottoman dependencies. It may be said that if elections are to be attended with these disorders, the seldomer they are renewed the better. But experience shows that the only way to prevent disorder is to render them uninteresting by frequent changes. An incapacity to be elected a second time would have been the only effectual preventative. The power of removing him every fourth year by the vote of the people is a power which will not be exercised. The kind of Poland is removable every day by the Diet, yet he is never removed.
Good grief. The TDS is undeniable.