President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE in an early morning tweet on Thursday turned his attention to Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE, asking if his former Democratic rival paid Russians during the 2016 election.

"Disproven and paid for by Democrats 'Dossier used to spy on Trump Campaign. Did FBI use Intel tool to influence the Election?' @foxandfriends Did Dems or Clinton also pay Russians? Where are hidden and smashed DNC servers? Where are Crooked Hillary Emails?" the president tweeted.

"What a mess!"

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Disproven and paid for by Democrats “Dossier used to spy on Trump Campaign. Did FBI use Intel tool to influence the Election?” @foxandfriends Did Dems or Clinton also pay Russians? Where are hidden and smashed DNC servers? Where are Crooked Hillary Emails? What a mess! — Donald J. Trump (@realDonaldTrump) January 11, 2018

Trump was referring to a "Fox & Friends" segment that questioned whether the dossier alleging times between his presidential campaign and Russia was used to obtain a warrant to spy on the campaign.

Trump at a press conference on Wednesday repeatedly denied any collusion with Russia, as he has in the past.

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His latest tweet follows Sen. Dianne Feinstein Dianne Emiel FeinsteinMcConnell says Trump nominee to replace Ginsburg will get Senate vote Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Intensifying natural disasters do little to move needle on climate efforts MORE's (D-Calif.) decision to release the full transcript of an interview between congressional investigators and the co-founder of opposition research firm Fusion GOPS, which commissioned the dossier.

The president blasted Feinstein in a tweet on Wednesday.

The fact that Sneaky Dianne Feinstein, who has on numerous occasions stated that collusion between Trump/Russia has not been found, would release testimony in such an underhanded and possibly illegal way, totally without authorization, is a disgrace. Must have tough Primary! — Donald J. Trump (@realDonaldTrump) January 10, 2018

That dossier has played a central role in the probes investigating Russia's election meddling and alleged ties between the Trump campaign and Moscow.