Not everyone will be happy to see Iran at the table. Saudi Arabia, deeply suspicious of Iran’s regional ambitions, argues that negotiating with Iran only legitimizes a government that is exerting malign influence in Iraq, Lebanon, Yemen, Bahrain and Syria. The Saudis, who are Sunnis, fought especially hard to keep Shiite Iran, its main regional rival, from the Vienna meeting and it took a trip to Riyadh on Saturday by Secretary of State John Kerry and a phone call on Tuesday by President Obama to Saudi King Salman to win them over.