Washington (CNN) Republican Sen. Lindsey Graham said Wednesday that he is concerned President Donald Trump's statements about Syria have emboldened ISIS and called on the President to rethink his decision to withdraw US troops from the country after the terror group claimed responsibility for a deadly explosion that killed US service members in the city of Manbij.

Graham, who was a harsh critic of Trump's plans to bring home US troops from Syria when the decision was announced last month, interrupted the confirmation hearing for Attorney General nominee William Barr to weigh in on the attack.

"My concern, by the statements made by President Trump, is that you set in motion enthusiasm by the enemy we're fighting. You make people we're trying to help wonder about us. And as they get bolder, the people we're trying to help are going to get more uncertain. I saw this in Iraq. And I'm now seeing it in Syria," he said.

"Every American wants our troops to come home, but I think all of us want to make sure that when they do come home, we're safe," he added.

Wednesday's attack comes less than a month after Trump announced that US troops would withdraw from Syria.

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