PORTLAND, Ore. -- Portland police officers have asked for an apology after they said organizers of a Barack Obama rally set up Porta-Potties on a memorial honoring fallen officers. Earlier this month, 75,000 people gathered in Waterfront Park in downtown Portland to hear Obama speak at a pre-primary rally. Officer Thomas Brennan, a seven-year veteran with the Portland Police Bureau, said he was happy to help at the rally after being called in on his day off. "On short notice, a lot of people had to cancel trips. But they were glad to do it," Brennan said. "It was very...