Earlier quoted context omitted.
I work at Google on ranking algorithms for Search. I'm aware of everything that controls how web pages are ranked. If I ever encountered a system that was designed to alter the results for political reasons, I would resign.
Just as an example: a controversial political figure's popular website is buried on page 5 of Google results (underneath a mountain of criticism) when you search for his name, despite being in the top 3 results of page 1 for all of Qwant, DDG, Bing, Mojeek, and Yandex. Obviously, the website is being downranked for being full of "conspiracy theories and fake news" (I wouldn't completely disagree that it is). But who…
(Lots of other search engines use each other as backends, so don't be too surprised when they return consistent results.)