(CNN) - South Carolina gubernatorial hopeful Nikki Haley will pick up a major endorsement Tuesday from one of her former rivals in the Republican primary – Attorney General Henry McMaster.
McMaster campaign manager Trey Walker told CNN that the attorney general plans to formally back Haley’s bid in a press conference Tuesday morning at his campaign headquarters in Columbia.
Haley’s sweeping victory in the four-way GOP primary last Tuesday ended McMaster’s gubernatorial ambitions, but the two Republicans maintained a friendly relationship throughout the race and spoke by phone several times in the wake of Haley’s win.
McMaster finished in third place, just behind Rep. Gresham Barrett, who faces Haley in a June 22 runoff.
Haley spoke warmly of McMaster the day after her big win, calling him “amazing” and “a joy to campaign with.”
McMaster’s campaign never became embroiled in the nasty back-and-forth over allegations that Haley had multiple extramarital affairs, but his reticence to get involved effectively pushed him out of the headlines in the final weeks of the race.
The fourth candidate in the governor’s race, Lt. Gov. Andre Bauer, endorsed Barrett last week.
Updated: 8:04 p.m.