A conference to discuss how to combat the Islamic State is under way in Paris. Made up of 26 countries, including the U.S., Saudi Arabia and Russia, it aims to show a united front on fighting the militant group. WSJ’s Mark Kelly reports PARIS—Top diplomats vowed Monday to back the Iraqi government’s fight against Islamic State but struggled to agree on concrete action, underscoring divisions among world powers over how to tackle the militant group. A group of 26 countries—including the U.S., Saudi Arabia and Russia—pledged to support Baghdad’s fight against the jihadist organization “by any means necessary, including appropriate military assistance.” French Foreign Minister Laurent Fabius told reporters after an international conference on combating the militant group that discussions focused on ways to cut off funding to the group as well as how to stem the flow of foreign fighters to Syria and Iraq. But the gathering failed […]