Donald Trump claimed on Monday that Google manipulated millions of voters into supporting former Secretary of State Hillary Clinton in the 2016 election, saying the company “should be sued” in his latest attack on the tech giant.

The president in a tweet referenced the work of a controversial psychologist who has claimed to have found evidence that Google’s search algorithms have been influencing voters.

“Wow, Report Just Out! Google manipulated from 2.6 million to 16 million votes for Hillary Clinton in 2016 Election!” Trump wrote. “This was put out by a Clinton supporter, not a Trump Supporter! Google should be sued. My victory was even bigger than thought!”

Wow, Report Just Out! Google manipulated from 2.6 million to 16 million votes for Hillary Clinton in 2016 Election! This was put out by a Clinton supporter, not a Trump Supporter! Google should be sued. My victory was even bigger than thought! @JudicialWatch

— Donald J. Trump (@realDonaldTrump) August 19, 2019

Trump did not link the source of his report, but he tagged conservative watch dog organization Judicial Watch. Psychologist and commentator Dr. Robert Epstein made similar claims while testifying before Congress in July.

Google CEO Sundar Pichai was asked about Epstein’s work last year when he testified before a House panel and said the company had investigated it and pointed to issues with the study’s methodology.

In 2017, Google dismissed Epstein’s research, telling The Washington Post that it amounts to “nothing more than a poorly constructed conspiracy theory.”

Trump has repeatedly claimed he did not lose the popular vote, though reports show he lost the popular vote by almost 3 million in 2016.

He’s also previously blamed his popular vote loss on “illegal” votes, or those of undocumented immigrants.

Twitter had some thoughts:

Just the President of the United States repeating a conspiracy theory that has been debunked multiple times, and advocating a lawsuit against a private corporation. In other words, just a regular day https://t.co/pg32HZwreR

— Mathew Ingram (@mathewi) August 19, 2019

please tell me more about how crazy it is to think he might not accept the election results if he loses in 2020 https://t.co/VShdPydM6v

— Adrenochrome Harvester (@ClenchedFisk) August 19, 2019

The Republican Party is led by that guy who spouts crazy conspiracy theories in the comments section that everyone ignores.

This is the guy Republicans rush to defend every single day, abandoning all dignity in the process. https://t.co/ozTqBiWWU3

— Dan Desai Martin (@DanMartinTalks) August 19, 2019

Wow!!! You actually are tweeting this pile of crap? DO you understand fact from fiction? Do you still have an association with reality? This tweet is clear evidence that you may not be connected with reality and not well. This is FAKE NEWS and evidence this man is sick. https://t.co/jEHj94fUSh

— Fred Guttenberg (@fred_guttenberg) August 19, 2019

Literally the most insane conspiracy theory… and stoked by the President of the United States.

Can we PLEASE STOP THE MADNESS! https://t.co/nw3jl4FdFa

— Happy in the Middle (@HappyMiddleNC) August 19, 2019