Either that or some feeble attempt at a dog whistle, like how he's openly speculated about her ethnicity, ie 'her given name is Harris but surely she has a different last name' type birther bullshit rambling
Which is crazy, because her Jamaican father is named Donald Harris (she didn't take her husband's surname), so if you actually follow Trump's breadcrumb and investigate Kamala Harris' lineage, you find a family name that is actually more common and more Anglo than Trump's last name (the anglicised version of the German "Drumpf").
I'm not a doctor, nor did I stay at a Holiday Inn last night. But no real medical professional would ever publicly confirm any actual diagnosis due to HIPPA concerns. What save you also saves him.
But, feel free to speculate all you want to. HIPPA doesn't cover speculation by non-medical people.