Two members of California’s national delegation aligned themselves on opposite sides of the gun control issue after President Barack Obama unveiled the most sweeping proposals for curbing gun violence in two decades Wednesday. Obama called a press conference with the aim of pressing a reluctant Congress to pass universal background checks and bans on military-style assault weapons and high-capacity ammunition magazines like the ones used in the Newtown, Conn., school shooting, the Associated Press reported Wednesday. A month after that horrific massacre, Obama also used his presidential powers to enact 23 measures that don’t require the backing of lawmakers. The …