AP Photo/Andrew Harnik
- Former President Trump's primary victory in South Carolina was widely expected.
- The root of those expectations were his appeal with evangelicals and rural voters.
- According to Edison Research exit polling, Trump also won among every age group in the GOP primary.
Former President Donald Trump's South Carolina primary win over former UN ambassador Nikki Haley was the culmination of a longstanding effort by the ex-president to cut off his potential and eventual rivals as he seeks to win back the White House.