Nikki Haley will end her White House bid, clearing path for a Trump-Biden rematch.

Iran PressAmerica: Former South Carolina Governor Nikki Haley will suspend her presidential campaign on Wednesday, according to a source familiar with her plans, ensuring that Donald Trump will win the Republican nomination and once again face Democratic President Joe Biden in November's election.

Haley will give a speech at 10 a.m. local time (1500 GMT) to address her future in the race, the source said, but she will not make an endorsement at that time. She will urge Trump to try to win the backing of her supporters, which include a significant chunk of moderate Republicans and independent voters, the source added.

Haley, who served as Trump's ambassador to the United Nations when he was president, will discuss the importance of a robust foreign policy, the source said. Throughout her campaign, Haley said the United States must help Ukraine defend itself against Russian aggression, a position at odds with Trump.

There was no indication Trump would moderate his message.

"He'll continue to focus on the issues that matter: immigration, economy, foreign policy," Karoline Leavitt, press secretary for the Trump campaign, said late on Tuesday.

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