Nikki Haley at the Republican National Convention in Milwaukee on July 16. Photo: Joe Raedle/Getty Images Former Republican presidential candidate and United Nations ambassador Nikki Haley will join public relations firm Edelman. Why it matters: It's a surprising move for a once-rumored vice presidential contender and someone who Trump has said will be on his team "in some form" should he win the election. The intrigue: Even though Haley endorsed Trump after the assassination attempt on him at...