President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE cited Russia's denial of meddling in the 2016 U.S. presidential election in a tweet early Thursday, asking why former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE did not examine the Democratic National Committee's (DNC) hacked email server.

"Russia continues to say they had nothing to do with Meddling in our Election!" the president said.

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"Where is the DNC Server, and why didn’t Shady James Comey and the now disgraced FBI agents take and closely examine it?" he added. "Why isn’t Hillary/Russia being looked at? So many questions, so much corruption!"

Russia continues to say they had nothing to do with Meddling in our Election! Where is the DNC Server, and why didn’t Shady James Comey and the now disgraced FBI agents take and closely examine it? Why isn’t Hillary/Russia being looked at? So many questions, so much corruption! — Donald J. Trump (@realDonaldTrump) June 28, 2018

The DNC in April sued the Russian government, the Trump campaign and WikiLeaks, alleging that they conspired to aid Trump in the 2016 election. The DNC allege that by hacking and publishing the committee's emails, multiple individuals and groups were part of a larger conspiracy to damage Hillary Clinton’s campaign and help Trump win.

Trump's campaign has dismissed the suit as "desperate."

The president's remarks come as White House national security adviser John Bolton works to hammer out details of an upcoming summit between Trump and Russian President Vladimir Putin.

Bolton, who met with Trump's Russian counterpart on Wednesday, said the issue of election interference came up in their discussions.

“We did indeed talk about Russian interference in the elections and I expect it will be a subject of conversation between the two presidents as well,” Bolton said.

Russia has repeatedly denied meddling in the U.S. election, a denial the U.S. intelligence community rejects.

Trump has said he believes the assessment from "our intel agencies” that Moscow meddled in the election using cyberattacks and disinformation.