Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

Iranian women attend a rally to protest the execution by Saudi Arabia last week of Sheikh Nimr al-Nimr, a prominent opposition Shiite cleric, shown in the posters, in Tehran, Iran, Monday, Jan. 4, 2016. Allies of Saudi Arabia followed the kingdom's lead and began scaling back diplomatic ties to Iran on Monday after the ransacking of Saudi diplomatic missions in the Islamic Republic, violence sparked by the Saudi execution of al-Nimr. (AP Photo/Vahid Salemi)
Iranian women attend a rally to protest the execution by Saudi Arabia last week of Sheikh Nimr al-Nimr, a prominent opposition Shiite cleric, shown in the posters, in Tehran, Iran, Monday, Jan. 4, 2016. Allies of Saudi Arabia followed the kingdom's lead and began scaling back diplomatic ties to Iran on Monday after the ransacking of Saudi diplomatic missions in the Islamic Republic, violence sparked by the Saudi execution of al-Nimr. (AP Photo/Vahid Salemi)

    JUST WATCHED

    Columnist: ISIS benefits from Iran, Saudi confrontation

MUST WATCH

Columnist: ISIS benefits from Iran, Saudi confrontation

Washington Post foreign policy columnist David Ignatius tells CNN's Jake Tapper that ISIS stands to benefit most from the sectarian war between Saudi Arabia and Iran.

Columnist: ISIS benefits from Iran, Saudi confrontation

Washington Post foreign policy columnist David Ignatius tells CNN's Jake Tapper that ISIS stands to benefit most from the sectarian war between Saudi Arabia and Iran.