There's nothing to manipulate. The majority of the US electorate is politically and literally illiterate. That's why their voting patterns are based almost entirely on the current economic sentiment, not the media.

Biden denied a worsening economic situation for the average American, and the response was Trump winning the election.

Trump has made the economic situation even worse, and his support is tanking. Which is why republican candidates are currently losing in landslides and we're breaking protest records.