Hundreds of people and companies "have dared" to sue him. They usually win a settlement with an NDA. That's why the suits disappear and you never hear about the outcome. There is no question about him breaking laws. He did, both federal and state laws, so even if he resigned and had Pence pardon him it would not save him.
But I doubt he will resign. It's just something he wouldn't do, even if it is the smart thing. Congress might still have to impeach him, if he tries something outrageous like a military coup. Did anybody know he can even be impeached after leaving office, just to disqualify him from any future office? I was surprised to learn that.