As per my post, this is trivial in terms of the other charges he may face, however, that does not mean that the case against him is weak.
He is not charged with having an affair with Stormy Daniels. He is charged with financial violations that stem from the payments he made to her via Cohen, which he claimed were legal fees - which is where the felony charge of "falsifying business records" comes from. He is further charged that the definition of the Daniels payment as "legal fees" violates NY Election law, as it misrepresents what the monies were intended for, and represent a de-facto illegal candidate promotion.
There is no "main charge" being prosecuted. It is a collection of related charges; with each fraudulent act by Trump intended (according to the DA/Prosecution) to conceal or misdirect from the previous fraudulent act.
Jail time for Trump is almost certainly a non-starter in this case, but the charges are clearly legit, and in the eyes of the law, he is being treated no different to any other NY businessman/woman who falsifies records.
It bears repeating that Trump has never won the popular vote, and that his grip on the Republican Party is dwindling - though the pea-brained cretins that make-up his base, will never not support him.....because they're pean-brained cretins.
Maybe he will still garner enough support from the Republican caucus to secure the nomination, but - should he be found guilty of this charge (forget the other more serious ones he will hopefully have to face-down soon) - the Democrats and Lincoln Republicans will be fielding attack-ads of him in chains, from the moment campaigning begins. Even if he isn't convicted, pretty-much the same will apply.
That being the case, I cannot see how this case helps him at all.
IMO, a much bigger threat to there being a second Trump presidency, is the increasingly-doddery nature of Biden, which could turn voters away from the Dems in significant numbers.