President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE sought to blame former President Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE over Russia's meddling in the 2016 election, sending a series of tweets on Tuesday morning that said his predecessor didn't do enough to stop Moscow.

Trump said that before the election, Obama thought Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE would win the presidential election and didn't want to "rock the boat." After Clinton lost, the president said "the whole game changed."

He also said that he has been tougher on Russia than Obama.

Trump's tweets come days after special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE indicted 13 Russian individuals and three groups on charges related to interference with the election. The Mueller indictment offered compelling details of how the Russian operation allegedly sought to hurt Clinton and help Trump in the presidential election.

The indictment provided no evidence that the Russian enterprise colluded with the Trump campaign or that Americans contacted by the Russians realized the alleged nature of the plot.

The president has come under criticism for not taking the allegations against Russia more seriously. Trump has said that Russian President Vladimir Putin has told him that Moscow did not interfere with the U.S. election.

Trump's first tweet on the issue Tuesday highlighted a quotation from Obama ahead of the election. He then slammed the former president's motives.

“There is no serious person out there who would suggest somehow that you could even rig America’s elections, there’s no evidence that that has happened in the past or that it will happen this time, and so I’d invite Mr. Trump to stop whining and make his case to get votes.” ..... — Donald J. Trump (@realDonaldTrump) February 20, 2018

....The President Obama quote just before election. That’s because he thought Crooked Hillary was going to win and he didn’t want to “rock the boat.” When I easily won the Electoral College, the whole game changed and the Russian excuse became the narrative of the Dems. — Donald J. Trump (@realDonaldTrump) February 20, 2018

Trump hit Obama on Russia one more time later on Tuesday, tweeting, “I have been much tougher on Russia than Obama, just look at the facts. Total Fake News!”

I have been much tougher on Russia than Obama, just look at the facts. Total Fake News! — Donald J. Trump (@realDonaldTrump) February 20, 2018

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Trump's tweets were his latest attack on Obama for what he says was a failure to adequately address concerns about Russian meddling, despite efforts by the U.S. intelligence community to investigate the plot in the months prior to the election.

Trump raised the point in a tweet on Monday, questioning why Obama didn't do more to address the Russian efforts.

"Obama was President up to, and beyond, the 2016 Election. So why didn’t he do something about Russian meddling?" Trump tweeted.

Trump, who frequently tweets while watching cable news, also gave a shoutout to "Fox & Friends" on Tuesday, thanking them for a "great timeline" on the Obama administration's failures on Russia.