President Obama on Wednesday met with former New York City Mayor Michael Bloomberg, an ally of the White House on gun control. The meeting, which was not on the president's public schedule, comes as he is weighing new executive action on guns in response to a series of mass shootings that have marred his presidency. . . Senior adviser Valerie Jarrett, a close Obama confidante who has spearheaded the White House's gun-control push, also attended the meeting.