Oregon Rep. David Wu apologized Tuesday for sending photos of himself dressed in a tiger costume to aides, calling that and other behavior last fall “unprofessional” and “inappropriate” as his mental health suffered. “You shouldn’t ever send photographs of yourself in a Halloween costume, something you intend to wear to a private party a couple of nights later,” the Democrat said on ABC’s “Good Morning America.” It’s just not professional, even when you’re joshing around with your kids a couple of nights before Halloween. I did send those photographs. It was unprofessional, inappropriate.” Half a dozen Wu staffers have quit...