His speech would probably be something like this:
"The people of 'Merica, I am leaving this race, this race I'm in, as I think, and have, fulfilled my duty in making 'Merica great again, so I am leaving this race.
When I thought to begin running for President, you, my supporters, that are very good at supporting, began to appear. Appearing with the greatness of 'Merica in your hearts, very freedom loving, and very god fearing hearts. And we have at every step, every hard earned, good step of the way, been working towards making America great again.
And I believe that I have done that, a belief I hold, I believe that I have done 'Merica good by making it great again, as the supporters, my supporters, have made their voices and complaints heard, very great voices with very important complaints, very important.
And since the people, my people, the supporters of me, are making real changes, great changes for 'Merica, I am no longer needed, not a requirement, for making our great changes any longer, as the people, my supporters, are making the changes themselves after my guidance, my very good guidance.
That's Terry Tibbs, thank ya an' gahd naht, much love.
Let's let you all make 'Merica great again. I am Trump, and we have Trumped the failing of 'Merica, to make it great again."