Not sure about Gov. Dayton, but Hillary did not merely faint, had a full-on neurological collapse indicative of serious underlying illness(es).
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I was being sarcastic about Hillary. My point was that he did not merely faint either.
I have never seen someone lose the ability to speak before they faint. I come from a fainting family (due to low blood pressure) and none of us start slurring our speech before we faint. We just faint.
Possibly a stroke or serious episode of hypoglycemia. Could be diabetic, on insulin or just have problems with low blood sugar events. Confusion, slurred speech can precede fainting in either scenario.
I almost fainted while doing multiple squat thrusts in Army basic training at age 23.