The takeaway here is that he's actually received a Target Letter, which indicates a strong belief that there is substantial evidence against him and that criminal charges are being seriously considered. It's a procedural step, and one that many people likely inferred, but it is important and shows a concrete stance on the investigation. It's worth noting that "Target" is a specifically defined legal term in this context, on relevant part:
A "target" is a person as to whom the prosecutor or the grand jury has substantial evidence linking him or her to the commission of a crime and who, in the judgment of the prosecutor, is a putative defendant....
The hed construction is nonetheless really weird. "Claims" is a pretty standard Trump-hed verb, but it's inappropriate here. Throwing "target" in quotes additionally serves to cast doubt on a very straightforward piece of news.
In the same way the criminals are the "target" on investigations into their crimes, right? Like, technically true, but missing an awful lot of pertinent facts.