In an interview with USA Today Jon explained some references.

«Question: What's the first song you wrote for "2020?"
Jon Bon Jovi: "Blood in the Water," and that was over two years ago. That's the one song about the current administration, and two years down the road, the story still holds up today. I can tell you the references: "Your shadow sold your secrets." Michael Cohen. "They say the noose fits like your necktie." Russian ties. "A storm is coming." Stormy Daniels or impeachment or the election.
Without taking sides, these are the facts and so I wrote it down. You know, "There's blood in the water. They're comin'. How you gonna deal with it?" I enjoyed being this narrator, this voyeur. And throughout this record, I sort of feel like that.»