A Maine nurses group on Monday said President Barack Obama's signature healthcare law, which is criticized by conservatives as overreaching, doesn't go far enough toward universal health coverage. The Maine State Nurses Association held Monday afternoon health screenings and an evening "town hall" event at the First Parish Church on Congress Street in Portland to advocate for the expansion of the federal Medicare program to cover all Americans, regardless of age. The organization is planning to hold a second wave of screenings and another town hall event Tuesday afternoon and evening at the Bangor Public Library.