Why is Harper on talk radio?

Maybe because, having successfully alienated the NSM (non-Sun media) he has nowhere else to go. If your strategy has been to reach the people more directly, through social media and local news outlets, and you feel you have to do something, then maybe that is what you do. But it looks hasty and ill conceived. And these local appearances cannot change the direction of a national story. So far, they have only made things worse, because he made fresh headlines this morning when he told one radio host Nigel Wright had not resigned, but “was dismissed”. The mainstream pack never liked Harper and it has years of frustration and anger to work off. Now, in Tory convention week, they have motive, means and opportunity – and a national audience.