The Federalist Papers : No. 75
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... However proper or safe it may be in governments where the executive magistrate is an hereditary monarch, to commit to him the entire power of making treaties, it would be utterly unsafe and improper to intrust that power to an elective magistrate of four years' duration.

It has been remarked, upon another occasion, and the remark is unquestionably just, that an hereditary monarch, though often the oppressor of his people, has personally too much stake in the government to be in any material danger of being corrupted by foreign powers.

But a man raised from the station of a private citizen to the rank of chief magistrate, possessed of a moderate or slender fortune, and looking forward to a period not very remote when he may probably be obliged to return to the station from which he was taken, might sometimes be under temptations to sacrifice his duty to his interest, which it would require superlative virtue to withstand.

An avaricious man might be tempted to betray the interests of the state to the acquisition of wealth. An ambitious man might make his own aggrandizement, by the aid of a foreign power, the price of his treachery to his constituents.

The history of human conduct does not warrant that exalted opinion of human virtue which would make it wise in a nation to commit interests of so delicate and momentous a kind, as those which concern its intercourse with the rest of the world, to the sole disposal of a magistrate created and circumstanced as would be a President of the United States. ...

Published by Alexander Hamilton in 1788.