(UPDATED) The McCains will try to oust President Trump by backing Joe Biden in 2020... or will they?

UPDATE: Contrary to the Washington Examiner's report, Cindy McCain has tweeted that she does not intend to support Biden, or any other presidential candidate in 2020.

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The feud with late Sen. John McCain (R-Ariz.) that followed President Donald Trump from the campaign trail to the Oval office will continue to hound him through the 2020 presidential election, according to one report.

The Washington Examiner reported that multiple sources say that members of the the McCain family plan to break with the Republican Party and support former Vice President Joe Biden's anticipated bid for president.

A former McCain campaign official with close ties to the family told the Examiner that support for Biden from the late senator's daughter Meghan and widow Cindy was a given, but that the question is how the pair can best help the former VP without harming his prospects in the Democratic primary.

"It's undeniable that Joe Biden and the McCain family have a very close, personal relationship," the source is quoted as saying. "It's about what's good for him [Biden]."

However, Cindy McCain, the late Senator's wife, denied that she would be supporting any presidential candidate, including Biden, in 2020.

Given the prominence and of far-left progressives in an already-crowded Democratic field, one of the biggest questions around his candidacy is about how well a more moderate, establishmentarian figure like Biden will ultimately fare in the primary, even if his prospects in the general election appear more bullish than his Democratic opponents.

The feud between Trump and John McCain goes back awhile. Trump made disparaging marks about McCain's Vietnam service record as far back as 2000. The two sparred over that and Trump's immigration comments on the campaign trail and continued through Trump's first two years in office and McCain's last months on earth.

The bad blood continued even after McCain's death. Trump was snubbed by not being invited to McCain's funeral and recently complained that he was never thanked for it. The president said he "was never a fan" of the McCains last month after Meghan clashed with a Trump campaign adviser on social media.

Earlier this week, multiple news outlets reported that Biden planned to formally launch his presidential campaign on Thursday. A Reuters/Ipsos poll released early Wednesday showed Biden at the top of the Democratic primary field with a 9-point lead. Immediately on his heels is self-described socialist Sen. Bernie Sanders (I-Vt.)