Democrats and the media are accusing anyone who criticizes special counsel Robert Mueller as Trumpian conspirators trying to undermine his probe. But who needs critics when Mr. Mueller’s team is doing so much to undermine its own credibility?

Wednesday’s revelations—they’re coming almost daily—include the Justice Department’s release of 2016 text messages to and from Peter Strzok, the FBI counterintelligence agent whom Mr. Mueller demoted this summer. The texts, which he exchanged with senior FBI lawyer Lisa Page, contain expletive-laced tirades against Mr. Trump. Such Trump hatred is no surprise and not by itself disqualifying. More troubling are texts that suggest that some FBI officials may have gone beyond antipathy to anti-Trump plotting.

“I want to believe the path you threw out for consideration in Andy’s office—that there’s no way [Trump] gets elected—but I’m afraid we can’t take that risk,” Mr. Strzok wrote Ms. Page in an Aug. 15, 2016 text. He added: “It’s like an insurance policy in the unlikely event you die before you’re 40.”

What “policy” would that be? The “Andy” in question is Andrew McCabe, the deputy FBI director. FBI officials are allowed to have political opinions, but what kind of action were they discussing that would amount to anti-Trump “insurance”?

In another exchange that month, Ms. Page forwarded a Trump-related article and wrote: “Maybe you’re meant to stay where you are because you’re meant to protect the country from that menace.” He thanked her and assured: “Of course I’ll try and approach it that way.” Mr. Strzok, recall, is the man who changed the words “grossly negligent” to...read more at WSJ