Former Nancy Mace chief of staff files to run against ex-boss for South Carolina House seat

Republican South Carolina Rep. Nancy Mace’s former chief of staff has launched a primary challenge against the lawmaker following his departure from her office last month.

In a bid to replace Mace as the representative for the Palmetto State's First Congressional District, Dan Hanlon filed his statement of candidacy with the Federal Election Commission on Friday.

Hanlon joined Mace’s office in 2021 after serving in the Trump administration’s Office of Management and Budget. He departed last month under reportedly contentious circumstances.

The address used in the FEC filing by Hanlon, who has faced criticism from Mace and her campaign for allegedly living outside the district, appears to belong to a Mellow Mushroom located in Hilton Head, South Carolina.

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Mace and Hanlon reportedly had a falling-out last fall when she voted with seven Republicans and all Democrats to oust then-House Speaker Kevin McCarthy, R-Calif., from his post.

Hanlon's decision to challenge Mace in the state's primary election, which is slated to take place on June 11, comes after a source told Fox News Digital earlier this month that a handful of former Mace staffers were informally aiding Hanlon's bid to replace his ex-boss in some capacity.

"I along with several other former staff are backing Hanlon in some sort of way," the source said.

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Mace's campaign told Fox News Digital earlier this month, amid reports that he planned to enter the race, that Mace "couldn’t get this lucky."

When reached for comment last week about the matter, Doug Stafford, a spokesman for Mace's re-election campaign, said, "This can’t be true. Mace couldn’t get this lucky? Well, would he move there, 'cause he sure as s--- doesn’t live there now!"

Mace offered similar comments at the time when she was asked about reports that Hanlon might run for her seat, telling Fox News, "I believe we put a statement out. He’s going to have to move to the district if he has to run."

A source familiar with Hanlon’s plans responded to her accusation at the time about his living outside the district, saying earlier this month, "Dan owns a home in the district. Rep. Mace had her ex-fiancé buy her one."

Fox News' Elizabeth Elkind contributed to this report.