The White House is considering the idea of using restraining orders to take firearms away from people considered dangerous as part of its response to last week’s massacre at a Florida high school, two people familiar with the matter said. Under extreme risk protection orders, which are also known as red flag laws or gun violence restraining orders, firearms can be confiscated from people found to be at risk. The White House is studying an Indiana version of the law, and is considering other measures as well, according to the people, who requested anonymity to discuss policy deliberations.