Mr. Smith, who spent more than two years aggressively collecting evidence to prove Trump mishandled classified documents and tried to overturn the results of the 2020 election, appears eager to publicly challenge Trump. Smith has made it unmistakably clear that he will not only defend himself but take a hammer to Mr. Trump’s exaggerated and false claims. There’s “tons of evidence” Smith said, that Mr. Trump had willingly retained the classified documents at his residence in Mar-a-Lago and tried “to obstruct the investigation.” Some Republicans have privately expressed concern that Mr. Trump’s quest for vengeance could backfire by giving a credible anticorruption investigator an open mic. Jack Smith still has the capacity to inflict significant political damage by discrediting the MAGA narrative that Trump did nothing wrong.