Can't remember how many people can be survielled up and downstream from a FISA warrant target. But 11 applications were pushed through initially? I would assume the up and downstream contacts of these people would include a large number of top players and would still be fair game for being monitored.
FISA GOES BOTH WAYS
Maybe the bigger question is this:
How many FISA warrants were issued AFTER DJT became president and all this information Q had available that could then be included in NEW FISA applications? There could be DOZENS of big name people (who are US citizens) being monitored, including all of our favorite villains.
Foreign actors are ALL fair game.