Projection is blaming someone else for your own bad behavior. We saw a classic case of projection in Thursday’s presidential debate, when President Biden—who is overseeing annual budget deficits of $2 trillion—asserted that his predecessor, Donald Trump, added more to the federal debt than anyone else. It’s part of the latest leftist argument: that if Trump wins the election, he will run deficits twice as large as Biden would. Debate moderator Jake Tapper joined the chorus of federal finance falsehoods when he claimed Trump had “approved $8.4 trillion in new debt,” while Biden’s actions will increase the debt by (merely)...