Slate has a wonderful visualization of the race for the GOP presidential nomination, created using polling data over time. The most interesting thing from my perspective: Romney's remarkable stability over time. It shows that he's not going away, but that Republicans still, after many, many months, haven't mustered the ability to fully embrace the guy yet. Poor Mitt.
Also, I appreciated Matt Bai's in-depth look at the current state of the GOP establishment. Illuminating.