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Sen. Lindsey Graham criticized the Biden-Harris administration's approach to global issues. (Getty Images) Sen. Lindsey Graham, representing South Carolina, warned of potential threats to the U.S., akin to another 9/11, if the current administration maintains its policies. Speaking on "Fox News Sunday" with Shannon Bream, Graham highlighted growing concerns about Iran's hostility in the Middle East and what he perceives as the administration's inability to end the conflict in Ukraine. "I'm more anxious about Iran…