text:  But the work days vary in length and are not rigidly structured. Biden and his most trusted advisers work on what they think would be the best to refine or practice in the moment. Pardon me. Biden's advisers say the setting itself will help highlight Trump's weaknesses and allow the president to combat the idea presented in a slew of misleading videos that he is a bumbling... He bumbles in public. Well, everybody knows he's bumbling in public because...