First he was invited, then he was uninvited, and now he’s been invited again. Mike Munger, Libertarian candidate for governor of NC and chair of the political science department at Duke University, will spar with Democratic candidate Bev Perdue and Republican Pat McCrory at Queen’s University October 15 from 7-8 pm. Perdue and McCrory are seasoned political vets, but with Munger in the debate, things will hopefully be a lot more interesting.