almost though even constitution never let crisis go waste president barack obama advisers finalize proposal would expand background check gun sales without congressional approval.white house adviser valerie jarrett say president ask team complete proposal submit review short order say recommendations include measure expand background checks.jarrett speak wednesday night vigil victims newtown shoot accord summary provide white house.after mass shoot roseburg oregon obama say team look ways tighten gun laws without vote congress white house officials say explore close so-called gun show loophole anti-gun advocate claim allow people buy weapons gun show online without background check.the move come follow deadly terrorist attack san bernardino california leave 14 people dead gun use massacre purchase legally opponents new gun control regulations argue proposals push obama would prevent tragedy recent mass shoot via blaze obama valerie jarrett finalize executive action gun control proposal