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NEW YORK — Nikki Haley will suspend her presidential campaign Wednesday after being soundly defeated across the country on Super Tuesday, according to people familiar with her decision, leaving Donald Trump as the last remaining major candidate for the 2024 Republican nomination.

Three people with direct knowledge who spoke on the condition of anonymity because they weren’t authorized to speak publicly confirmed Haley’s decision ahead of an announcement by her scheduled for Wednesday morning.

Haley is not planning to endorse Trump in her announcement, according to the people with knowledge of her plans. Instead, she is expected to encourage him to earn the support of the coalition of moderate Republicans and independent voters who supported her.

Haley, a former South Carolina governor and U.N. ambassador, was Trump’s first significant rival when she jumped into the race in February 2023. She spent the final phase of her campaign aggressively warning the GOP against embracing Trump, whom she argued was too consumed by chaos and personal grievance to defeat President Joe Biden in the general election.