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WASHINGTON (CNN) – Israeli Prime Minister Benjamin Netanyahu addressed the threat of terror in the Middle East, in his address to a joint meeting of Congress, saying that both the Islamic State and Iran are competing for the "crown of militant Islam."

"When it comes to Iran and ISIS, the enemy of your enemy is your enemy," Netanyahu said.

Netanyahu walked into the House to a hero’s welcome, as lawmakers stood and cheered for a highly controversial speech that comes during an ugly spat between the Israeli government and President Barack Obama, who has made clinching a deal with Iran a central piece of his political legacy.