It highlights the age gap between her and Trump by using her father’s age as a reference point. People are joking about how it sounds like they’re saying the age gap between her father and Trump has changed over time as if they age at different rates.
I think you could also read it as “was already [so old he was] older than her father.”
That’s the same reading. That doesn’t change the meaning at all. Am I taking crazy pills?
It highlights the age gap between her and Trump by using her father’s age as a reference point. People are joking about how it sounds like they’re saying the age gap between her father and Trump has changed over time as if they age at different rates.
Folks know that the author was trying to point out the age gap. But it was really poorly written, and they’re criticizing that writing.