Whatever it takes to get the hounds distracted off the trail of dump-lings Trump is leaving behind him is a good thing?
The fact that FOX has to drag its viewers back to the good 'ol days when all they had to do was lie, bitch, moan, rumor monger, complain and obstruct obstruct obstruct rather than actually participate in real governing is quite telling of what a really sad state of affairs the party now finds itself in.
As to the OP, this all smells of FOX being up to its old tried and true ploys giving its viewers something other than exposing the real and awful mess that Trump and the party is causing itself.
There may or may not be substance as to the allegations that FOX is reporting about Kerry, but that's not at all why they're coming out with stuff like this at this time.
This is Trump's fifteen minutes of fame and we all should be paying as much attention to him as possible because he is behaving like a crook on the run rather than an innocent man freely assisting Mueller to help clear him of any wrongdoing.
As an aside, when talking to friends who are Trump supporters, the sense I get is that they are sticking with him no matter what happens and that they are heavily relying on rationalizing their way through every damaging occurrence and revelation that hits the Trump admin. and clan.