Robinson, the sitting lieutenant governor who decisively won his GOP gubernatorial primary in March, has been trailing in several recent polls to Democratic nominee Josh Stein, the current attorney general.

"We are staying in this race. We are in it to win it," Robinson said in a video posted Thursday on the social media platform X. "And we know that with your help, we will."

Robinson referenced in the video a story that he said CNN was running, but he didn't give details.

"Let me reassure you the things that you will see in that story -- those are not the words of Mark Robinson," he said. "You know my words. You know my character."

The CNN report describes a series of racial and sexual comments Robinson posted on the message board of a pornography website more than a decade ago.

CNN reported that Robinson, who would be North Carolina's first Black governor, attacked civil rights leader Martin Luther King Jr. in searing terms and once referred to himself as a "black NAZI."

CNN also reported that Robinson wrote of being aroused by a memory of "peeping" women in gym showers when he was 14 along with an appreciation of transgender pornography. Robinson at one point referred to himself as a "perv," according to CNN.

The Associated Press has not independently confirmed that Robinson wrote and posted the messages. CNN said it matched details of the account on the pornographic website forum to other online accounts held by Robinson by comparing usernames, a known email address and his full name.

CNN reported that details discussed by the account holder matched Robinson's age, length of marriage and other biographical information. It also compared figures of speech that came up frequently in his public Twitter profile that appeared in discussions by the account on the pornographic website.

Media outlets already have reported about a 2021 speech by Robinson in a church in which he used the word "filth" when discussing gay and transgender people.

Robinson has a history of inflammatory comments that Stein had said made him too extreme to lead North Carolina. They already had contributed to the prospect that campaign struggles for Robinson would hurt former President Donald Trump to win the battleground state's 16 electoral votes, and potential other GOP downballot candidates.

Recent polls of North Carolina voters show Trump and Vice President Kamala Harris locked in a close race. The same polls showed Stein with a roughly 10-point lead over Robinson.

Stein and his allies have cited repeatedly a Facebook post from 2019 in which Robinson said abortion in America was about "killing the child because you weren't responsible enough to keep your skirt down."

The Stein campaign said in a statement after the report that "North Carolinians already know Mark Robinson is completely unfit to be Governor."

State law says a gubernatorial nominee could withdraw as a candidate no later than the day before the first absentee ballots requested by military and overseas voters are distributed. That begins Friday, so the withdrawal deadline would be late Thursday. State Republican leaders could then pick a replacement.

Trump has frequently voiced his support for Robinson, who has been considered a rising star in his party, well-known for his fiery speeches and evocative rhetoric. Ahead of the March primary, Trump at a rally in Greensboro called Robinson "Martin Luther King on steroids" for his speaking ability.

Trump's campaign appears to be distancing itself from Robinson in the wake of the report. In a statement to the AP, Trump campaign spokesperson Karoline Leavitt said the GOP nominee's campaign "is focused on winning the White House and saving this country," calling North Carolina "a vital part of that plan."

Leavitt went on to contrast Trump's economic record with that of Harris, not mentioning Robinson by name or answering questions as to whether he would appear with Trump at a Saturday campaign rally in Wilmington, or had been invited to do so.

A spokesperson for Harris' campaign, Ammar Moussa, said on X that "Donald Trump has a Mark Robinson problem" and reposted a photo of the two together.

Among North Carolina Republicans, spokespeople for the state GOP, House speaker and Senate leader didn't immediately respond to emails, voicemails and texts Thursday seeking comment. Scott Lassiter, a Republican state Senate candidate in a Raleigh-area swing district, did call on Robinson to "suspend his campaign to allow a quality candidate to finish this race."

Ed Broyhill, a North Carolina member of the Republican National Committee, said he spoke to Robinson Thursday afternoon and still supports him as the nominee. In an interview, Broyhill suggested the online details may have been fabricated.

"It seems like a dirty trick to me," Broyhill said.

On Capitol Hill, U.S. Rep. Richard Hudson of North Carolina, chair of the House GOP's campaign committee, told reporters the report's findings were "concerning." Robinson, he said, has some reassuring to do in the state.

Robinson, 56, was elected lieutenant governor in his first bid for public office in 2020. He tells a life story of childhood poverty, jobs that he blames the North American Free Trade Agreement for ending, and personal bankruptcy. His 4-minute speech to the Greensboro City Council defending gun rights and lamenting the "demonizing" of police officers went viral -- and led him to a National Rifle Association board position and popularity among conservative voters.

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Associated Press writer Meg Kinnard in Chapin, South Carolina, and Congressional Correspondent Lisa Mascaro in Washington contributed to this report.