A rare point of universal agreement in all this trenchant political acrimony: No matter what you think of Donald Trump, the political environment in which the flashy real estate mogul has so brilliantly thrived was created entirely by President Obama.

This explains the president’s truly bizarre performance during his graduation speech Sunday. The president is angry, he is defensive, he is spending his final months in office hopelessly trying to spin his failed presidency.

“In politics and in life, ignorance is not a virtue,” he said in a speech that was otherwise peppered with obvious references to Mr. Trump, who is already basically running against Mr. Obama’s third term, whoever the Democratic nominee will be.

“It’s not cool to not know what you are talking about,” he told the easy crowd. “That’s not keeping it real or telling it like it is, that’s not challenging political correctness. That’s just not knowing what you’re talking about.”