An oft-cited study by the Kaiser Family Foundation claims Maine would save $690 million over the next 10 years if Medicare is expanded nationwide; the fate of a bill designed to stop private sales of guns if buyers aren’t screened for prior criminal activity remains unknown; a “first-of-its-kind” work force bill gets kudos from Democrats and Republicans alike; and Democrats’ vague, conceptual alternative to LePage’s A-to-F grading system for Maine schools gets heard this week.