Donald Trump was allowed to Tweet back after a ban for 12 hours. Later Twitter permanently suspended his account after he violated its rules.
Twitter had temporarily blocked U.S. President Donald Trump for 12 hours and said that it would ban Trump "permanently" if he breached the platform's rules again. Twitter allowed Donald Trump to tweet again after certain posts were deleted. However, Trump did not pay heed to Twitter's warning and published 2 posts that Twitter found to be "in violation of the Glorification of Violence Policy." Following which Twitter permanently suspended his account. It said the decision was made "after close review of recent Tweets from the @realDonaldTrump account." and "due to the risk of further incitement of violence,"
Facebook's CEO Mark Zuckerberg also said in a statement: "President Donald Trump intends to use his remaining time in office to undermine the peaceful and lawful transition of power to his elected successor, Joe Biden [...] We believe the risks of allowing the President to continue to use our service during this period are simply too great. Therefore, we are extending the block we have placed on his Facebook and Instagram accounts indefinitely and for at least the next two weeks until the peaceful transition of power is complete."
As of now, Trump's Twitter account will indeed remain locked until further notice by the company.