I'm looking for language tools to use. Using both long and short sentences is one of them. Notice he's using that a bunch. I also noticed every pragraph has a

I'm looking for language tools to use. Using both long and short sentences is one of them. Notice he's using that a bunch. I also noticed every pragraph has a key idea which is expressed in the first sentence. (Or right after a short "filling" sentence). There's also repetition of same short sentence. That's a tool Trump uses a lot in his speeches. Author uses it only once. I'm looking for more tools like these that I can't see.