I'll kick it off with Scott Brown's decision not to run for MA-Senate. Not a huge surprise, but it certainly could have gone the other way...and his decision probably moves the seat from about a 40% chance for a GOP win to around a 10% chance, maybe less.
(And, yes, it's also a setback for the younger Senate. Don't want to forget that part of it).
Congressional confirmation hearings are overrated as far as their effects on confirmation are concerned. Hagel may or may not be confirmed, but I very much doubt that his mediocre performance will wind up mattering.
What else? What do you think mattered this week?