I just this second saw the clip. It was frightening - not because he's a politician and responsible for things, but because he's a human being and I was seeing it happen in real time. My son has seizures and sometimes they're exactly like what I saw this morning; the immediate stop in the middle of a sentence and the eyes that looked frozen. I really hope he's okay.
As I said earlier, my mom got these - she'd be talking - suddenly freeze - her facial muscles would droop - and a few seconds later, she'd pick up right where she finished mid sentence, except she would have dropped her fork or cup and ask how that happened.
She had NO IDEA it had happened. For a long time, she just didn't believe it. But it happened some years ago while she was driving with my Dad, and it caused the auto crash that eventually took his life and seriously crippled her.
I DO think he should resign, he's clearly not well. I don't know what the laws are in Kentucky, but it may be that the Democrat governor can appoint a Democratic senator (some states require an elecion, others actually require a member of the party of the person who resigned). Years after the accident, my mother believed she was cured and would drive by herself, unaware she posed a danger to herself and others.