Just before Tyler Robinson turned himself in for the murder of conservative activist Charlie Kirk, authorities say he appeared to leave a trail of incriminating messages on the online gaming platform Discord. Some lawmakers are threatening to impose more aggressive regulations and oversight on social media platforms. Asked if they were investigating more than 20 Discord users, Patel said, “It’s a lot more than that.”“We’re running them all down,” Patel said. AdvertisementRather than scrutinize Discord and other social platforms, Levin said, Congress would be better served examining the evolving nature of extremism. “Do you believe that social media is one of the instruments radicalizing America and inciting violence?” Graham asked Patel.