Former South Carolina Gov. Nikki Haley on Monday endorsed Republican Congresswoman Nancy Mace’s reelection months ahead of the GOP primary, even as the former president courts a challenger to run against the freshman House member. “Nancy is the conservative voice the Lowcountry needs in Washington,” Haley said Monday in a statement endorsing Mace. “She’s a fighter who stands up to Biden’s reckless spending, punches back against lawless lockdowns and mandates, and is strong on border security.” Mace, who is in her first term after unseating Democrat Joe Cunningham in 2020, is facing four challengers — Thomas Allen, Keith Blandford, Ingrid...