RENEE MONTAGNE, HOST:
And while Mitt Romney was eking out that win in Michigan, he pretty much walked away with yesterday's Arizona primary. Romney was expected to win in Arizona, but he walloped his closest challenger - that would be Rick Santorum - by 20 percentage points. Helped, in part, by the support of the last Republican presidential nominee, Arizona Senator John McCain.
And while all the attention was on Michigan throughout the night, NPR's Ted Robbins reports that in the all-important delegate count, the Arizona win counts for nearly as much.