This article quotes Mike Keen saying,
“The (anti-Trump) tweet that I replied to was deleted once mine started outpacing it in number of favorites and retweets. It was interesting to observe that once that tweet was deleted, mine stopped being interacted with. That’s because my tweet was no longer part of any “thread” in the conversation. Not a surprise, and nothing unusual about that. The only people who would see my comment are those who follow me already, which is a small number,” he writes. “Over the past few days, I have continued to reply directly to the President, voicing my support of his policies and ideas. However, I have found that while initially, for about the first minute or so, I get a flood of reactions and notifications. Favorites, retweets, etc, and then they abruptly stop, because my tweets are being manually removed from the main conversation thread.” “Every single Tweet by President Trump has top comments that are 100% negative. Positive replies are simply not seen. Twitter is absolutely censoring Pro-Trump replies and Trump supporters from voicing their support of the President,” he concludes.
Is there any possibility this is true? If so, is it documentably due to a flaw in the algorithm (i.e. people who disagree with Trump flag positive posts but people who agree with Trump don't flag negative posts), or is there evidence Twitter are pushing an agenda?