Trump did not win the post-debate polls. Trump seized on 11 online surveys, many of which allow people to vote many times , none of which veterinarian respondents, and none of which weigh results according to actual voting demographics.
Two of the online surveys Trump quoth on Tuesday came from the Drudge Report, which excoriated his main primary rival almost daily this spring, and Breitbart News, whose executive chairman is Trumps campaign chief executive. None of the 11 polls screened respondents or were predictive or representative of voters. It is therefore impossible to have any idea where those respondents are coming from, who they are, or whether they might be bots.
On Fox& Friends on Tuesday morning, Trump also said: I won CBS. There was no post-debate CBS poll.
Although these polls are scarcely flawless, social media surveys do not comparison. Trump did perform well in one poll, by LA Times/ USC , which devoted him a four-point leading. As a tracking poll, it did not ask about the debate.