On the eve of the South Carolina Republican presidential primary, where former President Donald Trump is expected to trounce former Gov. Nikki Haley, California Gov. Gavin Newsom, who has been backing President Joe Biden's re-election bid, called former South Carolina Gov. Nikki Haley "one of our better surrogates."

Haley, who served as U.S. ambassador to the United Nations during a portion of Trump's White House tenure, has been critical of the former president. Newsom said that Haley is "spot on" regarding "99% of it."

"Trump's the nominee. We all know that. You know that. Everybody out there knows that," he said while talking to CNN's Jake Tapper. Newsom noted that he believes Haley is "making a good case against Trump."

Polls indicate that Trump is poised to decisively defeat Haley in her home state. But Haley has declared that she plans to keep running after the South Carolina contest.

"South Carolina will vote on Saturday. But on Sunday, I'll still be running for president. I'm not going anywhere. I'm campaigning every day until the last person votes, because I believe in a better America and a brighter future for our kids," she said during a speech on Tuesday.

Trump appears to be on track to easily lock up the GOP presidential nomination and will most likely face Biden during the general election later this year if the incumbent Democratic president secures his party's nomination. Robert F. Kennedy Jr. is running as an independent candidate.

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