President Trump accused Facebook of being on "Crooked Hillary's side" during the 2016 campaign, while touting that his Democratic opponent spent hundreds of millions of dollars more than him on her unsuccessful campaign.

"Crooked Hillary Clinton spent hundreds of millions of dollars more on Presidential Election than I did. Facebook was on her side, not mine," Trump tweeted.

Trump is likely referring to recent reports questioning whether Russia-purchased Facebook ads swayed the 2016 presidential election. The ads were reportedly purchased on Facebook between 2015 and 2017 and targeted issues such as immigration and police brutality against minorities, which are believed to have attempted to trigger political turmoil.

Clinton too has pointed a finger at Facebook, blaming the social media platform's role in spreading fake news reports for contributing to her defeat.

Trump also tweeted Saturday that he keeps "hearing about 'tiny' amount of money spent on Facebook ads. What about the billions of dollars of Fake News on CNN, ABC, NBC & CBS?"

Facebook announced in early September that it discovered the sale of $100,000 in ads during the 2016 presidential campaign to accounts linked to a Russian company. Facebook turned over 3,000 ads connected to the Kremlin to Congress this month. The company previously had disclosed descriptions of the ads to special counsel Robert Mueller, who, along with congressional investigators, is looking Russian interference in the 2016 election and whether the Trump campaign colluded with the Kremlin.

The Senate Intelligence Committee has invited Twitter, Facebook, and Alphabet, Google's parent company, to testify publicly on Russia-related matters on Nov. 1.

Meanwhile, Sen. John McCain two Democratic senators have devised a bill that would force Facebook, Google, and Twitter to disclose who is purchasing online political advertising.

On Trump's claims that he spent hundreds of millions less than Clinton during the election, Bloomberg reports that Trump spent just over $646 million on his campaign, while Clinton spent $1,191 million during her 2016 run for president.