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

Meghan McCainMeghan Marguerite McCainWell-wishes pour in across media for Chris Cuomo after coronavirus diagnosis Clay Aiken podcast looks for political balance Meghan McCain announces pregnancy, plans to telecommute to 'The View' MORE, the daughter of late Sen. John McCainJohn Sidney McCainGOP senator suspending campaign fundraising, donating paycheck amid coronavirus pandemic Biden's pick for vice president doesn't matter much Juan Williams: Biden's promises on women are a big deal MORE (R-Ariz.), on Sunday denounced Donald Trump Jr.Donald (Don) John TrumpTwitter says coronavirus disinformation spread by Chinese officials does not violate rules Former lawyer for trophy hunting group joins Trump administration A rarely used fine could limit the spread of the coronavirus to the United States MORE for sharing a far-right conspiracy theory questioning the racial heritage of Sen. Kamala HarrisKamala Devi HarrisBiden confirms he's considering Whitmer for VP Democratic senators call on domestic airlines to issue cash refunds for travelers Biden's pick for vice president doesn't matter much 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 TrumpBiden campaign: Trump and former vice president will have phone call about coronavirus Esper: Military personnel could help treat coronavirus patients 'if push comes to shove' Schumer calls for military official to act as medical equipment czar 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 ObamaPoll: More Republican voters think party is more united than Democratic voters Can you kill a virus with a gun? Biden's pick for vice president doesn't matter much 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 ObamaLizzo donates lunch to hospital workers battling coronavirus Biden could be picking the next president: VP choice more important than ever Lobbying world 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.