Why does Donald Trump keep bringing up son Barron Trump's height?

Barron Trump, the 17-year-old high school senior is significantly taller than his dad, former United States president Donald Trump, who claims to be 6'3", and therefore the junior Trump's height has become a special topic for the senior politician. 

There's no doubt the ex-president makes frequent references to Barron's height, even if there is no verification of such claims. 

That's not shocking in and of itself, but what makes it unpleasant is that Donald doesn't appear to have anything else to say about his youngest kid.

Barron was just 11 years old in 2017 when he moved into the White House with his father — who was elected as the 45th president of the States — small enough to look up to his parents. However, the former first son grew like weed by the time the family returned to their Florida vacation home, Mar-a-Lago upon the completion of Donald's term in the office. 

He quickly brought up this "important" info in a speech that he gave at the North Carolina GOP convention luncheon in June 2021.

Later, the politician spoke in a podcast branch of "Moms for America”. When asked about his wife Melania and Barron, Donald once again felt the compulsion to make a statement about his son's height.

"[M]y son [is] a fantastic guy," he said. "He's a big tall guy too, very tall [...] about six-eight. He's up there, right? He's a great — he's a great young man, he's a very good student, and I think he's doing a good job, Barron. I think he's doing a very good job."