I watched the Biden-Trump debate alone in a Lisbon hotel room, and it made me weep. I cannot remember a more heartbreaking moment in American presidential campaign politics in my lifetime — precisely because of what it revealed: Joe Biden, a good man and a good president, has no business running for re-election. And Donald Trump, a malicious man and a petty president, has learned nothing and forgotten nothing. He is the same fire hose of lies he always was, obsessed with his grievances…