Looking at potential impressions on sent posts from @realDonaldTrump over the past year, the account had his strongest day on the night of the debate, earning over 2.5 billion impressions on Monday. This metric is calculated by adding the sender’s followers and the followers of all users who have retweeted the post.
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Michael Cohen

My problem with this analysis is that retweets don’t correspond with support or agreement with a candidate. An adjustment to the ‘impression’ metric would likely be relevant here. The main problem is the significant number of impressions caused by retweets of a candidate done with the intention and effect of calling out inconsistencies (lies, if you will), or other negative features.