Lindsey Graham chatted and smiled with Saudi Arabia's crown prince, who he previously called an 'unhinged' murderer he'd never work with

• South Carolina Sen. Lindsey Graham was pictured meeting Saudi Arabia's Mohammed bin Salman. 
• The US senator had pledged to isolate the Saudi leader over the killing of Jamal Khashoggi. 
• But he appears to have had a change of heart. 

Sen. Lindsey Graham held a meeting with Saudi Arabia's Crown Prince this week, a leader he had previously described as an "unhinged" murderer following the assassination of dissident Jamal Khashoggi. 

In a tweet Tuesday, Graham said he had just had a "very productive, candid meeting with the Saudi Crown Prince and his senior leadership team.

"The opportunity to enhance the U.S.-Saudi relationship is real and the reforms going on in Saudi Arabia are equally real," he added.