Donald Trump will remain suspended from Facebook Inc.’s networks for at least two years, and the world’s largest social media company said the former U.S. president will be reinstated in 2023 only if the risk to public safety has subsided. “Given the gravity of the circumstances that led to Mr. Trump’s suspension, we believe his actions constituted a severe violation of our rules which merit the highest penalty available under the new enforcement protocols,” Nick Clegg, Facebook’s vice president of global affairs, wrote Friday in a blog post.