Here's the video of it, which is at the top of Drudge right now with the headling "TRUMP TURNS OBAMA INTO STUTTERING MESS":
He does get hung up on the word "if," repeating it perhaps 10 times.
But I want to concentrate on "okey-doke." I knew I had an old post on that subject. Yes, here, from November 2014:
On "Meet the Press" this morning, Chuck Todd was talking to Secretary of Health and Human Services Sylvia Burwell, and he presented one of those amazing Jonathan Gruber clips like this: "This is how Gruber explained taxing high-end Cadillac health insurance plans and sort of doing a little 'okey-doke.'"ADDED: Obama's style of stuttering is highly reminiscent of William F. Buckley. I think it's what happens when a man with a will to dominate feels feels utterly relaxed and confident and is enjoying the game.
I had never heard "okey-doke" used like that. I only knew "okey-doke" as a cute/corny way to say "okay." I Googled and got to Ice Cube's "Don't Fade Me": "I don't fall for the okey-doke/And before I fall for the okey-doke/I let the pistol smoke." Rap Genius explains: "'Okey doke' is slang for pulling a trick on someone. Cube would rather commit murder than take care of a baby that isn’t his because the girl lied to him."
I read all the lyrics. They're pretty evil....