My daughter was a cleft palate and had to have years of speech therapy after her surgery, so I am not making a random comment. I bet Jackson didn't get much speech therapy, and as he has gotten older his speech has become more garbled. He covers up for it by talking fast and using rhyme and other rhetorical tricks.
If that’s the case, I won’t make fun of him. But it sounds like he could talk naturally if he wanted to.
What consonant sounds do cleft palate patients have trouble with?