To be fair, he had just woken up from a nap 5 seconds earlier, and then fell back to sleep right afterward!
You could maybe call it sleep talking.

Did trump just say JD Vance was incompetent as well as Tim Walz? What a doofus.

You give him too much credit. He has unwillingly lost the ability to speak like an adult, he makes about as much sense as a child trying desperately to tell you some annoying story. His speech loss is advanced. He's not all there and it's only getting worse.