(Reuters) – U.S. Republican presidential contender Nikki Haley, the lone remaining challenger to frontrunner Donald Trump, has vowed to continue her White House campaign despite failing to score any victories in the first two nominating contests. The former South Carolina governor and U.N. ambassador, who came third in Iowa and second in New Hampshire, faces her next major test against Trump when her home state holds its primary on Feb. 24. Here are some facts about Haley’s life and political career: DAUGHTER OF IMMIGRANTS Haley, 52, gained a reputation in the Republican Party as a solid conse…