And Trump is not implicated by any known evidence in "crimes to influence the 2016 election".
Do you mean any known evidence besides Cohen's plea? Because Cohen's testimony directly implicates the president in multiple crimes to influence the 2016 election.
He potentially committed a reporting violation depending on whether the payment of hush money to a mistress is a valid campaign expenditure.
The problem here isn't the marital infidelity and it isn't the hush money to the multiple mistresses. The problem is conspiracy to suppress campaign contributions by funneling the money through a shell corporation, which is a felony, and then directing his lawyer to lie to a bank in order to get a loan, which is also a felony, in order to pay the hush money. See the difference yet? The porn mistress hush money itself isn't a crime (except against god, if you lean that way), but the attempted cover-up is a criminal conspiracy directed by Donald Trump personally, and involved multiple crimes. Crimes committed for the specific purpose of influencing the election.
he doesn't have a single crime involving the election.
You keep saying that. I suggest you read Cohen's plea, it might change your mind. The tl:dr version is that the last part says "I am guilty of conspiring with Donald Trump to illegally influence the election."
And it's not like Trump hasn't publicly admitted to this already. He admits he illegally paid hush money to multiple mistresses, and we have the audio recordings of him literally conspiring to commit both felonies, with a known criminal, for the purpose of influencing the election. We have the bank records that verify the crime was then committed. We have the mistresses confirming it, and the lawyer pleading to it, and the Trump organization executives who helped perpetrate the crime have all been granted immunity. This evidence (that you claim doesn't exist?) isn't exactly secret, but for some reason Trump seems to think he is above the law on this one.
This is a pretty rock solid case. Trump will either have to be pardoned, or he'll be charged. Because he definitely did it. Whether you like him as a president or not, he broke multiple federal laws and he should be accountable for that.