VATICAN CITY – Pope Benedict XVI stressed the church's opposition to abortion and stem cell research in his first meeting with President Barack Obama on Friday, pressing the Vatican's case with the U.S. leader who is already under fire on those issues from some conservative Catholics and bishops back home...Afterward, the Vatican said the leaders discussed immigration, the Middle East peace process and aid to developing nations. But the Vatican's statement also underscored the pair's deep disagreement on abortion. "In the course of their cordial exchanges, the conversation turned first of all to questions which are in the interest of...