Who will leave Trump's Cabinet next?

Robert F. Kennedy Jr. has the strongest case for being the next Cabinet member to leave because the reporting shows real friction with Trump over vaccines and autism policy, plus signs that Trump has at least informally contemplated a replacement path. The references to Mehmet Oz being groomed as a possible successor matter because they are the clearest evidence that this is not just abstract speculation; there is some contingency planning behind the scenes. HHS instability and staff churn add to the sense that his department is the most fragile political environment among the leading contenders.

The main argument against a higher probability is that Kennedy still appears tenable and there is no confirmed departure signal. Trump may actually tolerate him longer than a more conventional appointee because Kennedy fits parts of Trump’s anti-establishment and anti-vaccine posture, and that overlap can reduce the likelihood of a sudden firing. In other words, the same controversy that creates vulnerability also gives him some insulation, since Trump may prefer keeping an unconventional ally in place rather than triggering a messy replacement fight.

Compared with the rest of the field, RFK looks more exposed than Chris Wright, Brooke Rollins, and probably Markwayne Mullin, while Pete Hegseth appears the main alternative threat because his own profile is also politically volatile. The current 29% market price looks a bit low to me given the combination of reported replacement chatter and department instability, but not dramatically so because the absence of a confirmed break means timing remains uncertain. This is a real lead, not a conviction trade; the market is probably understating RFK’s vulnerability by a few points rather than by a wide margin.