In New York law, falsifying business records (which Trump was charged with) is only a misdemeanor. However, if the falsification was done with intent to help commit or conceal a crime, then it is elevated to a felony. Famously, the prosecution provided the jurors three candidate crimes, and told them they need not agree which they felt Trump was guilty of, just so long as they all felt there was at least one. These three "other" crimes were:
- violation of federal campaign finance limits
- violation of state tax laws regarding the reimbursement.
- violation of state election laws by unlawfully influencing the 2016 election
My understanding is that in situations where the misdemeanor of falsifying business records is upgraded to a felony, then the defendant is charged with both - the falsification of the records, and the crime it helped.
Note, in order for the misdemeanor to be upgraded to a felony, the prosecution merely needs to prove the defendant intended to commit a crime - not that they did, or it could even be proven that they did. That is not my question. My question is why, in this specific case, did the prosecution not charge any of those three crimes? Since it certainly is the case that Trump did commit them (in the argument of the prosecution), and that the prosecution was not lacking evidence of the crimes.
A bonus to answers that provide legal precedence around the topic.