One might infer who Nikki Haley's followers could support in a future election based on a number of variables, including the candidates, their platforms, and the political environment that exists at that particular moment. During the Trump administration, well-known Republican Nikki Haley represented the United States at the UN. She has, however, also criticized some facets of Trump's presidency, most notably the way he handled the Capitol riot on January 6.
Depending on her program and degree of agreement with their views, Nikki Haley's fans might vote for her if she were to run for office herself. Her fans might think of another candidate who has similar policies and ideals if she isn't in the contest.
It would depend on how Haley's followers view each contender and their positions toward Trump vs Biden. Because of Trump's past association with Haley and his adherence to conservative ideals, some people might still back him. Some might be turned off by Trump's policies and leadership style and instead be drawn to Biden or another Democratic contender. In the end, it's challenging to generalize about which candidates Nikki Haley's followers would support without taking into account the particulars of the election and the individuals in question.