Bernie Radio Ad in Ohio

I live in the Dayton, Ohio area and we have a 80s and 90's country Radio Station in town. Their airwaves have been filled with local republican primary candidates ad for the last month. Today I was driving to the store and was jamming out to some Vince Gill and next thing I know I heard Bernies voice. I was so confused as if the radio channel had switched. But no, he is playing and ad a minute long talking about the banks and how free trade has hurt jobs!!! I'm damn impressed because not a channel a Democrat would target but it's the blue collar workers who vote against their own interests that listen. I have a good feeling about Ohio as long as he is close in Michigan!!