Mark W. Smith discusses exactly why President Trump is not subject to the 14th Amendment . . . and cites a SCOTUS decision to back up what I stated regarding POTUS and VPOTUS not being "Officers of the United States", and then goes on to cite other case law. He's verbose, but bear with him.
For reference:
The SCOTUS case Mark Smith cites regarding defining "Officer of the United States" from 13 years ago . . .
2010 Free Enterprise Fund v. Public Company Accounting Oversight Board (PCAOB)
https://en.wikipedia.org/wiki/Free_Enterprise_Fund_v._Public_Company_Accounting_Oversight_Board
The majority decision was written by Chief Justice John Roberts. The case isn't 14th Amendment related. It concerned the Securities and Exchange Commission (SEC), its members appointed by the President, confirmed by Congress, etc. They're Officers of the United States. The PCAOB is a Board under the oversight of the SEC that was set up under the 2002 Sarbanes-Oxley Act to oversee corporate accounting practices. Its members are also appointed by the President, confirmed by Congress, etc. They're also Officers of the United States. In several sections of its decision, John Roberts definitively defines precisely what constitutes an "Officer of the United States". The decision and its dicta are lengthy, diving into the relationship between the President with the SEC, and then the POTUS relationship with the PCAOB under SEC control and supervision. I don't recommend reading it. If interested, search for "Officer of the United States" and/or "Officer" in the decision to find the sections relevant to the 14th Amendment and the SCOTUS case about to be heard in early February. I have to give Mark Smith considerable credit for finding and/or knowing about this case. Something one would have to do legal clerk research and Shepardize to find using a Sherpardizing Service. It's what the law clerks sometimes get paid the big bucks for (eventually).