A spokeswoman for Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE's presidential campaign denounced a far-right conspiracy theory about the California Democrat's race after it was boosted by bots and right-wing personalities this week.

Trump-world personality Ali Alexander tweeted during Thursday night's Democratic debate, “Kamala Harris is *not* an American Black. She is half Indian and half Jamaican. I'm so sick of people robbing American Blacks (like myself) of our history. It's disgusting. Now using it for debate time at #DemDebate2? These are my people not her people. Freaking disgusting.”

The online attack was retweeted by Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE, although he later removed it.

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Harris's campaign communications director Lily Adams told CNN that people including President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE similarly questioned former President Barack Obama Barack Hussein ObamaObama warns of a 'decade of unfair, partisan gerrymandering' in call to look at down-ballot races Quinnipiac polls show Trump leading Biden in Texas, deadlocked race in Ohio Poll: Trump opens up 6-point lead over Biden in Iowa MORE's place of birth. He was born in Hawaii.

"This is the same type of racist attack his father used to attack Barack Obama," she said. "It didn't work then and it won't work now."

A spokesman for Trump Jr. told The New York Times that his post was a misunderstanding.

“Don’s tweet was simply him asking if it was true that Kamala Harris was half-Indian because it’s not something he had ever heard before,” said spokesman Andy Surabian, “And once he saw that folks were misconstruing the intent of his tweet, he quickly deleted it.”

According to multiple news outlet, the president's son shared the tweet with the remark “Is this true? Wow.”

Alexander's tweet was also copied verbatim by a network of bots that had previously been identified by researcher Josh Russell.

A number of Harris's fellow 2020 candidates condemned the conspiracy.

Obama had faced similar conspiracy theories, which were widely seen as racist, while serving as president.