President's Cooks

Hello,

I am trying to help my friend, who is a chef, answer a few tricky trivia questions for a chance to win few local advertisement. We both are stuck on this one question:

What U.S. President placed this newspaper ad?

A cook is wanted for the family of the President of the Unitied States. No one need apply who is not perfect in the business, and can bring indubitable testimonials of sobriety, honest and attention to the duties of the station.

Any guesses?

Thanks,

Dee Dee Kelly