So Trump tweeted that out yesterday.

A number of folks quickly fact checked the claim and found it ridiculous, but perhaps none as well known as this person. 

Here is more courtesy of Mediaite:

Trump appears to be referring to the work of controversial psychologist Dr. Robert Epstein, who has testified before the Senate in July, “biased search results generated by Google’s search algorithm likely impacted undecided voters in a way that gave at least 2.6 million votes to Hillary Clinton (whom I supported).”

Epstein has been repeating this theory for years, and in 2017 Google told the Washington Post that it amounts to “nothing more than a poorly constructed conspiracy theory.”

It is very important to pay attention to what Trump is doing here because I really think he is laying the groundwork for challenging the outcome of the 2020 election, which I think he believes he will lose. 

Trump was all set to challenge the results of the 2016 elction, and then was surprised that he won. 

I think he is dusting off that same playbook for 2020.