Junior Retweet: “Is Robert Mueller Mentally Retarded?”

Mediaite reports:

Donald Trump Jr. promoted a tweet from conservative polemicist Dinesh D’Souza calling Robert Mueller “mentally retarded” during a spate of attacks on the special counsel Wednesday. During his testimony, Mueller said he was “not familiar” with Fusion GPS, a research firm that hired Christopher Steele to look into President Donald Trump’s connections with Russia. The president’s son retweeted D’Souza, a self-styled historian, and piled on Mueller for his claim about Fusion GPS.