Ever since then-executive chair Steve Bannon left Breitbart to join Donald Trump's 2016 campaign for president, the alt-right news outlet has been associated with Trump's upset victory over Hillary Clinton. In 2015, some Breitbart employees alleged that Trump gave the site money in return for positive coverage, according to BuzzFeed.

Such coverage included a glowing review of Trump's book "Time To Get Tough" -- written by Bannon himself.

"Detailed, innovative, and smart, 'Time To Get Tough' rivals all other GOP presidential candidates' books in both specificity and serious policy proposals," wrote Bannon.

This sort of cooperation allegedly occurred on multiple occasions.

Bannon denied the accusations in 2015 while still executive chair of Breitbart, approximately a year before departing to join the Trump campaign.

"We have no financial relationship with Donald Trump as an investor, advertiser or in any other capacity at this time -- nor have we ever," said Bannon in his 2015 statement to BuzzFeed. "The insinuation that we do -- or did -- is a lie. Mr. Trump is a savvy and successful businessman but not the type of investor I partner with in emerging growth companies."

Bannon's statement went on to claim objectivity in Breitbart's political coverage: "We would assume Mr. Trump's campaign would seek to advertise on our pages just like campaigns of Scott Walker, Ted Cruz, Ben Carson, Carly Fiorina and others have. As for coverage of Trump, he's the Republican front runner and we're glad his campaign -- just like every other campaign on the Republican side and certain campaigns on the Democratic side -- values our impeccable news judgment and our audience."

Trump has no direct ownership stake in Breitbart, but some of his biggest campaign financiers are also part-owners of Breitbart, according to the Washington Post: the wealthy and conservative Mercer family, which has also provided major financial support to conservative organizations such as the Heritage Foundation and the Media Research Center.

Breitbart declined to identify any specific members of the Mercer family who have an ownership stake in the news site. "I can't say more than 'the Mercer family,'" said Larry Solov, president and chief executive officer of Breitbart. "That's all I can specify right now."

Throughout 2016, Robert Mercer and wife Diana gave just under $3.4 million to the Trump campaign, the Republican Party, and a super PAC run by Trump adviser Kellyanne Conway.

The Mercer family and Breitbart are likewise interconnected, with Bannon having served as Rebekah Mercer's political adviser.

The family has also given just under $35 million to various Washington think tanks and state policy groups.