Two California lawmakers publicly blew up at each other earlier this month, hitting a nerve on an issue that has long-divided the state’s elected leaders: Whether and how much to offer government-subsidized health benefits to undocumented residents. Just 20 years ago, “in the early 2000s, the idea of offering this benefit was considered political suicide for both Democrats and Republicans,” said Arturo Vargas Bustamante, faculty research director at the UCLA Latino Policy and Politics Institute.