Nikki Haley hasn’t yet won a GOP contest. But she’s vowing to keep fighting Donald Trump

There are no wins on the horizon for Nikki Haley.

Those close to the former United Nations ambassador, the last major Republican candidate standing in Donald Trump’s path to the GOP’s 2024 presidential nomination, are privately bracing for a blowout loss in her home state’s primary election in South Carolina on Saturday. And they cannot name a state where she is likely to beat Trump in the coming weeks.

But ahead of a major address on Tuesday, Haley told The Associated Press that she will not leave the Republican primary election regardless of...