NEW : Key senator says agreement close on bipartisan proposal . Some GOP senators oppose a threatened filibuster by their colleagues . Sen. Reid still hopes for a compromise on a package of gun laws . Comment:
NEW : Key senator says agreement close on bipartisan proposal . Some GOP senators oppose a threatened filibuster by their colleagues . Sen. Reid still hopes for a compromise on a package of gun laws . The issue has become a major focus of President Obama 's second term .