Something tells me the itis won't be joining them this time.
Hops means this:
When you get a FISA for person A. You can spy on everyone they talk to. So if A talks to B, you can spy on B. That's "1 hop". But what that means is you effectively get to spy on C if B talks to C. 2 "hops".
So what he's saying is that you have Page with a FISA, he talks to B, B talks to C, C talks to POTUS, you can spy on POTUS.