"[T]he FBI... exists, among other things, to investigate federal crime, threats to the national security, and to collect foreign intelligence. ...That's what we're focused on. [W]ith respect to Russia in this context, our job is to detect, deter, disrupt, and defeat their operations. Lawfully... [A]s we are focused on Russia, we have groups of people that constantly... their job is to focus on nothing but Russia. As we're staring at the Russian problem, to the extent that other people, third country nationals, or Americans, or anybody else comes across our radar screen, and has a connection to the Russians in some way that looks nefarious to us, and falls within the scope of the Attorney General guidelines that authorize us to conduct investigations... If that comes across the radar screen, then we... investigate that, and run it down wherever it goes. ...[A]nd we'll deal with other Russian threats simultaneously. You're constantly staring at that problem, and to the extent that any Americans cross... our radar screen, then we will investigate that."