From the article: “The race seems to be slipping away from Lugar and the American Action Network may want to avoid inflicting any more damage on Mourdock, the likely nominee, ahead of what could be a competitive general election race...”
That would be a refreshing change for the R establishment. It’s usually scorched earth against any conservative who dares challenge them.
Notice this PAC packed their bags quickly, after Palin endorsed Mourdock.