Despite the White House’s myriad attempts to rein in Robert F. Kennedy Jr.’s conspiratorial rhetoric, Donald Trump himself is still expecting anti-vax results.

The president is reportedly losing faith in his health secretary’s ability to slash childhood vaccines. The issue came to a head during a May lunch at Trump’s National Golf Club in northern Virginia, when Trump pressed Kennedy as to why he wasn’t doing more to probe the (widely debunked) tie between vaccines and autism. At the time, Trump told Kennedy point blank that he believed the secretary “had the yips,” The Wall Street Journal wrote Monday night, citing sources familiar with the conversation.

The topic reared its head again at a mid-June meeting between the two men in the Oval Office, during which Trump lamented that Kennedy simply wasn’t doing enough.

Trump reportedly believes he has given Kennedy ample time to prove himself, and is disappointed that Kennedy hasn’t made more progress.

Practically every conversation between Trump and his health secretary circles back to the vaccine conspiracy, reported the Journal. The president has shared with his aides that he believes Kennedy will be a failure if he fails to produce results.

In fact, lobbyists and Department of Health and Human Services staffers suspect that Trump will replace Kennedy with Centers for Medicare and Medicaid Services chief Dr. Mehmet Oz, likely after the midterms, the Journal reported.

Trump regularly turns to Oz for health policy advice, even on issues that have nothing to do with Oz’s agency. Oz, in turn, makes sure Trump gets his way every time.

The president’s priorities on the matter have since been made clear: HHS must do more to peel back the federal guidelines for the childhood vaccine schedule, reducing the number of shots given to children.

Sources who spoke with the Journal suggested that the president is all in on the anti-vax conspiracy, sharing that Trump expects to see autism rates drop as a result of the decreased inoculations.

Limiting vaccine access was a core tenet of Kennedy’s “Make America Healthy Again” agenda—until White House advisers pressured him to lie low, fearing that his rabble-rousing, anti-science ideology could further harm Republican odds come November.