This was originally supposed to be a message to Martha, but Dionne Warwick wanted to record it, so Hal David reluctantly changed the name.
Might have been better to leave it as Martha, as it would have saved the song's premature death by GOP-attempt-at-humour when George Bush senior tried to build a joke about it relating to Michael Dukakis. I suspect he only fell back on it after having four speechwriters spend three days trying to make something out of Duke Of Earl sounding a bit like Dukakis.
This version, by the way, is the Marvelettes cover, made all the better by their never having run for high office since their 1988 Midterm bid to represent Kansas in the House.
[Buy: Message To Michael]
[Part of 24 Hours from David]