After months and months of campaigning, Mitt Romney is finally sounding like a conservative. It took the strong challenge by Rick Santorum in Romney’s home state of Michigan to produce this transformation. But it worked as Romney overcame a double-digit Santorum lead to win yesterday’s Michigan primary.

To fight off Santorum, Romney unveiled a supply-side tax plan to cut income tax rates 20 percent across the board. He also proposed reforming Medicare in a way similar to that of House Budget Committee chairman Paul Ryan, the top Republican thinker on domestic policy.