Nikki Haley, the former U.S. ambassador to the United Nations under former President Donald Trump, has hired key staff and is canvassing potential donors as she explores a presidential run against her former boss in 2024, according to people briefed on her plans.

Haley is putting together a national finance committee and communications team in advance of a potential campaign, these people explained. Some of the new hires have been directed to report for work at Haley’s nonprofit Stand for America Inc. and her political action committee Stand for America PAC in Charleston, S.C., by Feb. 1, these people added. All of the people who spoke with CNBC asked not to be named because Haley’s plans aren’t public and could still change.

Political consultant Mary Kate Johnson, meanwhile, has been reaching out on Haley’s behalf to major political donors in recent days to gauge their interest in joining the finance committee, two of these people added.

Johnson has worked closely with Haley in recent years, raising money through her consulting company MKJ Inc. for both Haley’s nonprofit as well as her political action committee, tax records, federal election commission filings and local business records show.