If there’s one thing President-elect Joe Biden understands it’s that chief executives lead by example. Presidents set the tone for the nation. In that regard, there’s nothing wrong with the next president “going high” in the face of a soon-to-be ex-president whose entire business model is going low — underground septic-tank low. In fact, Biden’s sentiments about healing a deeply divided nation are commendable, even if he only ends up reducing the fever by one or two degrees. Irrespective of the outcome, Biden will have to balance noble outreach, reconciliation and, yes, political hardball. We all have our roles to play in the discourse, and this is his.