Commentary For months, I’ve watched pundits in numerous media—both left and right—assert that the federal probe into Hunter Biden and his business associates ended shortly after Joseph R. Biden was sworn in as our nation’s 46th president. Then Politico dropped a bombshell saying it had been handed by a confidential source when it published a report on July 16 about how the U.S. Attorney for Delaware, David Weiss, may have suddenly started issuing search warrants in the Hunter Biden criminal investigation. And that wasn’t all. It turned out that Weiss had also seated a federal grand jury for the probe, and this grand jury had proceeded to issue a flurry of subpoenas. But how can this be? It was widely assumed in almost all quarters of the U.S. news media that upon being sworn in to their offices, one of the first items of business for new President Biden and his …