Cambridge Analytica whistleblower Christopher Wylie blasted Facebook’s (FB) continued influence after its widely publicized data scandal, amid a recent controversy over the site’s refusal to remove a Trump campaign ad that makes false assertions about Democratic presidential contender Joe Biden.

The advertisement claims the former vice president tried to pressure a Ukrainian prosecutor to drop a probe of his son, Hunter — an argument that’s been widely debunked. It forms the basis of a widening controversy that’s sparked an impeachment inquiry in Congress, and given Facebook’s critics new ammunition to blast the platform’s practices.

Recently, Facebook said that it would not attempt to fact-check political ads — a position the company reasserted as the Biden campaign moved to have the spot taken down.

In a recent interview with Yahoo Finance, Wylie — who blew the lid on the data scandal that walloped Facebook last year — insisted that the site was “making a choice” to spread false information. He compared the company to a “stalker” on a date.

“So if one campaign is basing itself on a scaled spread of disinformation and fake news in its advertising campaign, and you say we’re just not going to do anything about it, you are making a choice, whether you like it or not, to help one side,” Wylie said to Yahoo Finance’s YFi PM.

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