1. Using the Trump model as to who should or shouldn't hold office, Franken should do what Trump has done. Stay in office despite having engaged in this behavior,
2. Using the Trump model as to who should or shouldn't hold office, Trump says it's the right of the voters in Alabama to decide Roy Moore's fate. Therefore, let the voters of Minnesota decide Franken's fate.
3. The woman involved with Franken isn't asking for his resignation or removal. Does her opinion matter?
4. My personal opinion? Franken should take it upon himself to resign. If then he is genuinely contrite, he can proceed to make amends in the private sector.