After the Supreme Court upheld the heart of President Obama's healthcare law Thursday, hospital administrators at Olive View-UCLA Medical Center in Sylmar said the ruling brought relief for their patient population, about two-thirds of which is uninsured. The hospital, which draws patients largely from the San Fernando Valley but also from North Hollywood and Antelope Valley, has seen increasing numbers of emergency room visits in recent years. But the court's ruling also presents a new set of challenges for the hospital, the largest of which is how to stay competitive when patients have the option to get care elsewhere—a choice many have never had before.