U.S. Secretary of State Marco Rubio met Pope Leo at the Vatican as tensions grew over Donald Trump’s remarks on Iran and criticism of the pope. (Credit-Reuters) U.S. Secretary of State Marco Rubio came to the Vatican on Thursday for a potentially fraught ‌encounter with Pope Leo as President Donald Trump has continued a series of disparaging attacks on the Catholic leader over the Iran war. Rubio’s convoy drove through the central Roman boulevard leading to the Vatican under tight security, arriving at 11:10 am (0910 GMT) for the first visit between the pope and a Trump cabinet official in nearly a ​year. The closed-door meeting between Leo and Rubio, who also serves as Trump’s national security adviser, is expected to last about ​a half-hour. Rubio will meet afterwards with the Vatican’s top diplomat, Italian Cardinal Pietro Parolin. Leo, the first U.S.…