A week and a half from the Iowa caucuses, two 2024 Republican presidential contenders attempted to convince voters that former President Donald Trump isn’t a lock to win the nomination — and prove their own electability. Florida Gov. Ron DeSantis and former South Carolina Gov. Nikki Haley warned Iowa Republican voters Thursday night that nominating Trump again could cost their party the White House in November. DeSantis sought to show a more relatable side of his personality. He opened by handing CNN moderator Kaitlan Collins the jersey of University of Iowa women’s basketball star Caitlin Clark — poking fun at...