You really have to be careful, here, to make the distinction between
1. The Russians hacking the election, which is definitely a real thing that totally happened, and
2. Donald Trump actually helping the Russian hack the election, which would be a crime.
Trump wants very much to conflate these two issues, for some reason that I've yet to fully grasp. He's been trying to confuse people into thinking that #1 didn't happen, so #2 must not also have happened, but that seems exactly backwards to me. He should instead by trying desperately to separate the two, because #1 is now an established fact and #2 would potentially send him to prison. He should be forcefully defending himself from #2 while acknowledging #1 and what a big problem it is.
Unfortunately, lots of Americans have heard Trump outright lie about #1 often enough that they believe him instead of the collective conclusion of the entire US intelligence community in 100% agreement (about #1).
I think we're still up in the air on #2, whether or not his campaign aided the hacking efforts. They certainly seemed eager for them to proceed, and both publicly (at the convention) and privately (like in Jr.'s emails) encouraged those activities. They offered advice on how to maximally impact the election by hacking, but if they didn't actually do the hacking or disseminating themselves, is that really a crime? If I tell you how I want you to murder someone and then you go do it, am I also guilty of murder? Of some lesser crime, but still legally culpable?
We already know that most of his senior staff has been guilty of a variety of things regarding Russia. Carter Page, Paul Manafort, Jared Kushner, Michael Flynn, Marc Kasowitz, Michael Cohen, Jeff Sessions, and Donald Trump Jr have each admitted to inappropriate dealings with the Russians, to varying levels of severity. They met with Russian spies, or were literally being paid by foreign powers to work on their behalf. Then they lied to security investigators, and/or the Senate, about meeting with Russian spies or working for foreign powers. They all look dirty, but that doesn't mean Trump himself necessarily did anything illegal. He could have been the clueless figurehead in the middle of a vast Russian conspiracy, rather than the head of the conspiracy.
And I'm still not sure it matters. Russia has totally pwned us, one way or the other. If they want to undermine American power and influence in the world, they've certainly accomplished that goal with this adminstration, and arguably they can continue to enhance it by feeding the story line that basically the entire White House staff is dirty, whether it's true or not.