WASHINGTON — Homeland Security Secretary Janet Napolitano promised to release more illegal immigrants into the United States, saying the budget sequester has left her no choice. Several hundred detainees have already released because of the sequester, she insisted. They were released on bail, or because their legal status had changed, she said. “We’re going to continue to do that … for the foreseeable future,” Napolitano said at a March 4 breakfast meeting hosted by Politico. “We are going to manage our way through this by identifying the lowest risk detainees, and putting them into some kind of alternative to release.”