Manipulated search results can swing 80% of undecided voters
https://www.scribd.com/document/377329039/Epstein-Mohr-Martinez-2018-Wpa-The-Search-Suggestion-Effect-sse-wp-17-03?secret_password=qZ8JSbCYbcGWGNdRiFIo
This is a scientific study on search engines that looks at the effect of things like search suggestions. If you believe Russia stole the election with a Facebook ad, what about Facebook itself?