Well you got your precedent and then you got your legal precedent. I'm not sure there is a Presidential precedent, but if there is it wouldn't come under legal precedent unless he was won of those "President for Life" types, which would set a precedent in this country. It seems pointless to not comply with a law established to allow the very same activity unless it somehow then becomes a matter of public record which would blow the whole value of secretly doing anything.

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89 300E
79 240D
72 Westy
63 Bug sunroof
85 Jeep CJ7
86 Chevy 6.2l diesel PU

"The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane."
Marcus Aurelius