This article.....[www.thegatewaypundit.com] lays out some of the problems with the Southern District New York Sentencing Memorandum.
Quote from the source....."Robert Khuzami, the “Acting” US Attorney, filed a sentencing memo claiming President Trump organized illegal payments. Khuzami doesn’t know the law. Non-disclosure contracts are legal in every state. It’s not an illegal campaign contribution. Not a crime. Khuzami is wrong.
Trump did not use campaign funds. A candidate may make unlimited contributions to his own campaign. Yet, Robert Khuzami convinced Cohen, a liar and tax cheat, to plead guilty to a non-crime. Khuzami wants to be the guy who brings down the President."
From what I understand Jarrett makes good points concerning the legality of non disclosure agreements and Trump not using campaign funds. So the probability is no Campaign Finance rules were broken because there was no crime. Cohen pleading guilty on this may just be part of the plea deal? That is the nature of plea deals, especially ones involving politics.