Democratic leaders, however, have chosen to focus on background check legislation that already passed the House. Sources have told the Daily News that the leaders think they can best pressure on Senate Majority Leader Mitch McConnell (R-Ky.) on background checks because public support for them hovers around 90% and better. But they are also concerned that moderate Democrats in swing districts would face a backlash for backing a weapons ban, and are unlikely to pursue one unless they believe it is certain to get 218 votes — the number required to assure passage.