You noticed that too.
Trump said very little about the other guys, just answered Bill O. Rubio and Cruz couldn’t stop bashing Trump.
Kasich stayed out of it, as he did in the “debate”, I have to give him points for that.
Yes, Kasich would be my second choice and I would like to see Trump ask him to be VP. I started out liking Cruz, but I researched him and read his book and I didn’t like what I found. He is also a real personality turn off. Rubio is a little boy.