You might be interested in research by Robert Epstein which calculates how Google search rankings impact votes. He measured how many votes this changed and put some economic value on it.
Here's a quick interview between him and Larry King. His Congressional testimony is also really great, but it's over an hour long. You can find it on Youtube if you're interested.
https://www.youtube.com/watch?v=xS3uETvzZZ0
To put it simply, Google decides who wins every close election. If that's the future you want, where tech oligarchs and/or a rogue lower level employee controls entire elections across the globe, then that's the world you have today.
Trump's tweets are a red herring. I'm not a Trump supporter.