Donald Trump beat Nikki Haley in South Carolina’s GOP primary on Saturday, but it was his victory speech that was the talk of the town. The former president’s speech stood out to many political onlookers at first because of his introduction of Lindsey Graham, a U.S. senator from the state who was relentlessly booed by the crowd of Trump’s own supporters. Trump repeatedly tried to get the crowd to quiet down, but they just kept booing. There was no obvious reason for this, other than perhaps that Trump had said Graham was further to the “left” than him on most political issues. But Trump also d…