regarding the target/subject discussion, here's the summary paragraph of a po pat (ken white) explanation:
Given Mueller's caution (applying for judicial approval whenever necessary) and standard methodology (developing the case through subpoenas and interviews, catching suspects in lies and using those lies to flip them as cooperators, steadily indicting new defendants as they become vulnerable), the most reasonable explanation is that he means what he says — Trump is a subject. That doesn't mean he's made a determination that Trump won't be indicted, or that it's unlikely he'll be indicted, or that he hasn't committed crimes or wrongdoing. It doesn't reflect a judgment on whether there has been a crime. It means he's not there yet. Calling Trump a subject is completely consistent with continuing to pursue evidence that would move Trump into the target column. It doesn't reduce Trump's exposure at all. It doesn't change the dilemmas his godforsaken criminal defense lawyers face. It doesn't reduce the manifest dangers of him making a statement to Mueller. It doesn't stop the process or the process stories or the steady rolling-up of Trump associates for various crimes and foolishness.
what it means that trump is only a subject
sorry if elsewhere posted. didn't see.