McCain on National Service

According to a new article in Reason, John McCain "has long agitated for mandatory national service." I knew that McCain, unlike many other Republicans, is a fan of AmeriCorps, the volunteer national service program started by Bill Clinton. But mandatory national service is an altogether different animal. It is hard to imagine anything that would push more libertarians from the R to the D column than the Republican party endorsing mandatory national service.

I have not heard Senator McCain speak on this topic recently. If anyone has a reference, please post it in the comments section.