President Obama outlined his plan for lowering gun violence. Will it have a measurable effect on shootings? Or is it a first step in changing the terms of debate? Meantime, the GOP is holding a retreat to rethink its political message. First up, make a short-term deal on the debt limit. Finally, Obama officially begins his second term on Monday - what's his legacy so far? And what does he need to do to ensure success in the next four years?