First signs that Democrats are willing to take on pro-gun lobby as even NRA-endorsed senator Joe Manchin says 'we need action'The White House promised a comprehensive series of measures, including gun control legislation, on Monday to prevent a recurrence of mass shootings such as the "horrific" attack in Connecticut that left 20 children and six teachers dead.The pledge came as the first cracks began to appear in the seemingly impregnable opposition to gun controls.