"South Carolina Republican Primary: Key Details and Live Updates"

Former U.N. Ambassador Nikki Haley faces a critical election in South Carolina's Republican presidential primary, where she has been trailing behind former President Donald Trump. Despite this, Haley has vowed to stay in the race and has received significant financial support. South Carolina's more conservative voter base presents a challenge for Haley, who has been doing best among more moderate and open-to-alternative voters. The primary will award all 50 delegates to the winner in a winner-take-all system, and a record number of voters have already participated in early voting.