Sen. Lindsey Graham (R-SC) spoke to Greta Van Susteren tonight in a wide-ranging interview about ISIS taking over Ramadi and his June 1 announcement on plans to run for the White House.

ISIS has reportedly gained control of Ramadi after Iraqi government forces abandoned the city.

An estimated 25,000 people fled from the key Iraqi city after ISIS fighters began their assault on the city center over the weekend, Fox News reported. 

Graham told Van Susteren that ISIS gaining control over Ramadi "is a predictable outcome of withdrawing all forces back in 2011." 

The potential 2016 presidential candidate explained that since President Barack Obama refused to take the military's advice to leave troops behind in Iraq, "everything you see before you is a result of that big mistake."

"Taking Ramadi by ISIL really is a blow to political reconciliation and it's exhibit A of Obama's failed military strategy," Graham stated. "We don't have enough American forces in Iraq to change the momentum on the battlefield."

Graham also shared that he is "99 percent" sure that he will run for president in 2016. 

He said that he will make an announcement on his intentions June 1 in his hometown of Central, South Carolina.

Watch the full interview in the video above. 

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