Meghan McCain blasts Trump Jr. for retweeting 'disgusting' and 'racist' post about Kamala Harris

Meghan McCainMeghan Marguerite McCainMeghan McCain blasts NY Times: 'Everyone already knows how much you despise' conservative women Sanders aide hits 'millionaires on "The View"' after segment on Warren dispute Meghan McCain blasts Trump for 'bullying widows at a public rallies' MORE, the daughter of late Sen. John McCainJohn Sidney McCainMartha McSally fundraises off 'liberal hack' remark to CNN reporter Meghan McCain blasts NY Times: 'Everyone already knows how much you despise' conservative women GOP senator calls CNN reporter a 'liberal hack' when asked about Parnas materials MORE (R-Ariz.), on Sunday denounced Donald Trump Jr.Donald (Don) John TrumpComedians post fake Army recruitment posters featuring Trump Jr. Trump Jr., Ivanka garner support in hypothetical 2024 poll FWS: There's 'no basis' to investigate Trump Jr.'s Mongolian hunting trip MORE for sharing a far-right conspiracy theory questioning the racial heritage of Sen. Kamala HarrisKamala Devi HarrisParnas pressure grows on Senate GOP Sanders defends vote against USMCA: 'Not a single damn mention' of climate change The Hill's Morning Report — President Trump on trial MORE (D-Calif.), a 2020 presidential candidate. 

"What's happening to @KamalaHarris is disgusting and unquestionably racist," she tweeted. "And while the tweet was deleted, it appears that the Trump family tradition of spreading racial demagoguery and conspiracy theories lives on...," she added.

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McCain's comments come as many 2020 presidential candidates voice outrage over a social media post that falsely claimed the California senator, who is of Indian and Jamaican descent, is not black. 

President TrumpDonald John TrumpTrump's newest Russia adviser, Andrew Peek, leaves post: report Hawley expects McConnell's final impeachment resolution to give White House defense ability to motion to dismiss Trump rips New York City sea wall: 'Costly, foolish' and 'environmentally unfriendly idea' MORE's eldest son retweeted a post by Ali Alexander, a conservative media personality, claiming that Harris “comes from Jamaican Slave Owners” but is “not an American Black.”

“Is this true? Wow,” Trump Jr. tweeted to his 3.65 million followers before deleting it.

Harris's campaign on Saturday denounced the online attacks, comparing them to the conspiracy theories produced about former President Obama's place of birth. 

"This is the same type of racist attack his father used to attack Barack ObamaBarack Hussein ObamaNational Archives says it altered Trump signs, other messages in Women's March photo Climate 'religion' is fueling Australia's wildfires Biden's new campaign ad features Obama speech praising him MORE," Harris spokeswoman Lily Adams told CNN. "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.”

President Trump helped promote the conspiracy theory that questioned whether Obama was born in the United States. 

"The whole thing was crazy and mean-spirited, of course, its underlying bigotry and xenophobia hardly concealed," former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaOvernight Health Care: Trump reportedly lashed out at health chief over polling | Justices to hear ObamaCare birth control case | Trump rolls back Michelle Obama school lunch rules Trump to roll back Michelle Obama's school lunch rules on vegetables, fruits Barack Obama shares birthday message to Michelle: 'In every scene, you are my star' MORE wrote in her memoir, "Becoming." "But it was also dangerous, deliberately meant to stir up the wingnuts and kooks."

McCain, a daytime talk show host, has repeatedly criticized Trump during his time in office.

She said in late May that Trump was a "child" who will always be "deeply threatened" by her father following a report that the White House wanted the USS John S. McCain "out of sight" during the president's visit to Japan.