From Chris Truax, an appellate attorney who served as Southern California chair for John McCain’s primary campaign in 2008 [I cannibalized that from the article below]:
Given this lack of independence in Trump’s Cabinet, I’m not sure what the ultimate solution is. But I know that the first step is for Trump’s most loyal supporters to admit, even if only to themselves, that there is a problem, just as Biden’s supporters did for him.
Donald Trump is showing all the signs of suffering from dementia. If this were a neighbor, a parent, or a family friend, you would have no trouble seeing it. We should not turn our heads just because it is the president. [“Trump’s mental decline is undeniable — so what now?” The Hill]
Truax alludes to the problem, doesn’t he? The relevant section of the 25th Amendment, pertaining to the involuntary relieving of the President of his duties and, eventually, his office, reads …
Section 4. Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.
Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department [sic][note 2][7] or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office. Thereupon Congress shall decide the issue, assembling within forty-eight hours for that purpose if not in session. If the Congress, within twenty-one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty-one days after Congress is required to assemble, determines by two-thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.
The thing about having a man-child with pathological narcissism as President and a subservient majority in the Senate is that the President, almost to the last Secretary, will select nominees whom he can dominate and manipulate, simply as a matter of his psychological processes. He’s not comfortable with competent, independent people, because he himself is not competent and only barely independent.
So could Vice President Vance, himself a weak occupant of his office, gather enough negative opinions from the Cabinet to oust the President?
Doubtful.
