Simple, Mr. Architect, because the Democrats beat up on Republicans for things they did decades ago (Bush - drinking) but it’s okay for Democrats to smoke pot (Obama), cheat on their wives (Clinton, et al), and other indiscretions from years past.
He needed to say something that needed to be said. And, it’s not Bill he’s after - he’s just a dog, and that’s all that has to be said - it’s about his “wife”, who to this day, I can’t BELIEVE women could respect.