Not all older people are sexually attracted to other older people. A 70-year-old friend of mine confessed that he’s sad and frustrated because any woman he is attracted to is way too young for him. (He’s not a creep who would actually bother younger women.)
I worry about this myself. I’m still young enough that I think women my own age are attractive, but to be honest I can’t imagine being attracted to a retirement-aged woman unless she is one of those celebrities who have a hidden painting that ages instead of them.
The actual transcript:
I’m no fan of Trump but this is unambiguously not a threat. The clear meaning is that she would would change her mind if she was one of the soldiers who would be fighting a war that she supports, not that Trump would threaten her with a gun until she changed her mind.