Obama's improving his act

“Personal charm may be Obama’s last best hope” headlined the Washington Post on Monday. That charm was on ample display at the annual vanity fest called the White House Correspondents Association dinner over the weekend.

The dinner always features two comedians — one professional, and the other, the occupant of 1600 Pennsylvania Avenue. Skilled joke writers contribute the one-liners, but delivery counts, too, and President Obama has clearly improved over the course of four years. In 2009, some of his jokes were in bad taste. He said Dick Cheney was writing his memoirs, to be titled...