Cardinal Francis George, a vigorous defender of Roman Catholic orthodoxy who led the U.S. bishops’ fight against Obamacare and played a key role in the church’s response to the clergy sex abuse scandal, has died. He was 78. George, who retired as Chicago archbishop in the fall of 2014, died this morning after a long fight with cancer, according to the Archdiocese of Chicago. He announced in December 2014 that doctors had determined their treatment for the cancer found on his kidney had failed. Appointed …