This, of course, wasn't scientific at all except for the fact that we were running ads to attract both sides of the discussion equally. They were geographically limited to the US. About a week before the elections the trend was unmistakable. The support for Trump in the form of CTR, engagement and votes to the hundreds of different ads out there told a story.
We actually tried to get this story out and attempted to publish a press release. It was rejected by all of the top press release agencies we used for other business. Not one of them wanted to publish that things were not looking good from Clinton, even from a silly little entertainment site.
To confirm the bias a few days later we issued a press release indicating that Clinton was catching-up and Trump was predicted to lose. Everyone published the release.
We can't have the media operate with such bias in this country. Freedom of the press is important, but when the press become political activists we should all yell foul and reign them in. The first thing totalitarian regimes do is take control of the press. We can't have a press that is so far to the left that they won't report the truth, or worst, distort it.
I know this is just one data point. There are plenty more from other sources. The bias and manipulation are very real.