"Any reason why???" (Why Teresa's eldest son isn't involved in the campaign)
In an interview she gave in 2002 she said the following about him:
She speaks of how her oldest son, John IV, started "hating her" two years ago, when his daughter was born. (He declined to comment.)---Link
It's weird that she would casually mention such a personal matter about her child to a reporter. From what I've read and seen, she doesn't seem to mind embarrassing those close to her.