"Just received a briefing from National Security Advisor Bolton about escalating tensions with Iran. It is clear that over the last several weeks Iran has attacked pipelines and ships of other nations and created threat streams against American interests in Iraq," Graham said in a pair of tweets.

He added that "if the Iranian threats against American personnel and interests are activated we must deliver an overwhelming military response. Stand firm Mr. President."

The fault lies with the Iranians, not the United States or any other nation.



If the Iranian threats against American personnel and interests are activated we must deliver an overwhelming military response.



Stand firm Mr. President. — Lindsey Graham (@LindseyGrahamSC) May 20, 2019

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Graham's tweets come after he publicly warned last week that the administration was leaving lawmakers, including himself, in the dark about threats from Iran and the State Department's decision to pull most U.S. personnel out of Iraq.

“No, I feel we haven’t been well informed," Graham said last week. "I don’t think it’s fair for us to walk around wondering.”