(This is a question on probability, not a discussion on politics. Hate or love the President, I hope you all can respond with a mathematical response.)

According to a new survey from Gallup, 41% approve, and 53% disapprove of the President. Hypothetically, let's assume this translates to 41% of Americans are "Trump supporters," and 53% of Americans are not supporters. Looking at the President's tweets we find that every listed first comment to a tweet accurately reflects a response from a non supporter of the President. What is the probability that this has occurred without intervention, if 41% of the comments are from Trump supporters of 5k tweets (roughly) since entered the US Presidential election process?

Given your answer, and assuming there should be no bias on twitter's part, what credibility rating (1-10) would you give twitter with regard to objectivity?