It was just a nothingburger that slipped his mind. Besides that, the rules are for the little people, anyway.
And with the power and inordinate influence that their wealth blesses them with, folks like the Trumps are hellbent on pushing the limits of those rules in their favor and decidedly against the will of the little people making things so much easier for the Trumps of the nation to exploit at their leisure.
The little people of the nation are the vast majority that, through their unification, can dictate terms to the few very wealthy, of whom have wrested an innate power from the little people, and that something is constitutionally vested in them through the power of their vote. The very wealthy have done this via splitting the working class demographic into warring factions by forcibly pointing out what makes them different from each other and why they should hate each other because of it.
The GOP leadership, and most every one of the Repub legislators they lord over have been bought and paid for by these few wealthy folks of whom lavishly benefit from this arrangement, but its been at the expense of the little people who have seen their economic power continuously dwindle while the economic power of the few very wealthy continue to expand more and more.
That the GOP have quite successfully exploited their policy of dividing and conquering through incessantly sowing fear and hate in the hearts and minds of their constituency is the one major impediment toward unification of the working class, yet is the one and only tool the GOP has left toward keeping their constituency under their control.
Without it, it would immediately become quite clear to every working class American who their actual enemy really is, and they're few, they're right here at home, and they are hard at work keeping the nation divided and spiteful of "the others".
Trump did exactly that through his presidential campaign, no two ways about it.