2 minutes ago Senate overcomes filibuster, votes to open debate on gun bill Posted by CNN's Tom Cohen Washington (CNN) - The U.S. Senate voted Thursday to overcome a Republican-led filibuster against tougher gun laws, clearing the way for a major congressional debate on a package of proposals sought by President Barack Obama in the aftermath of the Connecticut school massacre. The procedural vote followed a breakthrough by Sens. Joe Manchin, D-West Virginia, and Pat Toomey, R-Pennsylvania,