Is it my imagination, or is Clint Eastwood showing signs of age-related cognitive decline?
I'm not sure. It would seem so, if you based things on that appearance alone, but he's been in other TV situations, like interviews, where he was fine. He does have a naturally drawn-out way of speaking that could just as easily be accentuated by a couple of stiff shots on an empty stomach.
And of course, he was trying to ad-lib the whole thing which is a skill best left to people who have that particular talent. What seemed like losing his place in a sentence could just as easily have been stumbling around as he tried to think of what he should say next.