We looked at Trump’s Twitter interactions for more than a year. A lot of them are suspicious.

http://www.salon.com/2017/08/21/we-looked-at-trumps-twitter-interactions-for-more-than-a-year-a-lot-of-them-are-suspicious_partner/
"Trump frequently does quote tweets from unverified accounts (not using the Twitter “quote tweet” function but literally quoting a tweet). These quote tweets have been called out in the past for featuring white supremacists, and it appears that he also quotes tweets with some frequency from accounts that appear to be either fake accounts or bots."