I haven't come across any prominent story related to Trump and Kellyanne Conway's kids. It's possible that there just isn't one that has gained significant media attention or public interest.
He developed his physical comedy skills through years of practice and performance experience. He was naturally gifted and had a unique sense of humor that translated well into physical comedy.
Sorry, I don't know. There could be several male characters depending on the specific details of the story. If you can describe the events or other aspects, it might help.