WASHINGTON – The Justice Department proposed Wednesday that Congress roll back legal protections for online platforms, putting legislative form to President Donald Trump’s war against Twitter and other social media companies.The proposed changes announced by the Trump administration would strip some of the long-held protections of companies such as Facebook, Google and Twitter shielding them generally from legal responsibility for what people post on their platforms. “When it comes to issues of public safety, the government is the one who must act on behalf of society at large.