Days after social media giant Twitter banned President Donald Trump from its platform, San Francisco police are bracing for a demonstration by his supporters early today at the company’s Market Street headquarters. While there’s been no official word about a mass demonstration, there has been social media traffic urging Trump supporters to gather at Twitter headquarters. Twitter employees have been working remotely due to the COVID-19 pandemic since August.  Twitter “permanently suspended” Trump’s account Friday, declaring in part it was “due to the risk of further incitement of violence” following the Wednesday storming of the U.S. Capitol by Trump supporters, which Trump encouraged via messages on the platform.