HARRISBURG, Pa. — When Kathleen Kane ran for Pennsylvania attorney general, she campaigned as a corruption-buster who would be independent of Gov. Tom Corbett and find out why it took more than three years to investigate Jerry Sandusky. She was a rising star, winning in a landslide to become the first woman and first Democrat elected to the office. Democrats cheered when she refused to defend Pennsylvania’s ban on same-sex marriage and shut down Corbett’s effort to outsource management of the …