"No reason to believe" Google tried to use spam filters to benefit Democrats. The Federal Election Commission (FEC) has cleared Google of allegations of deliberate bias against Republican campaign emails that amounted to campaign contributions to Democratic candidates.
These allegations surfaced in 2022 in response to a study from North Carolina State University. Researchers there looked at the automatic spam filters—algorithms that attempt to ferret out spam and send it to a separate folder—used by Gmail, Microsoft Outlook, and Yahoo! Mail. To do so, they created accounts on all three and used these accounts to sign up for a slew of Republican and Democratic campaign emails.
