I understand the impulse whereby liberal friends post clips from the correspondents’ dinner last night of Obama and his claque beating Donald Trump’s palms with a ruler. But how quaint. As this year’s Sarah Palin — a man with less than zero chance of getting the GOP nomination for president — Donald Trump inspires liberal handwringing because his hair is awful and provoked the president into one of the most cowardly demonstrations of obeisance to Beltway politics I’ve ever seen. Concentrate instead on Obama’s policies, not dead enders.