BRUSSELS - European Council President Donald Tusk said on Tuesday that a letter sent to him by British Prime Minister Boris Johnson included no 'realistic alternatives' to the contentious Irish backstop. 'The backstop is an insurance to avoid a hard border on the island of Ireland unless and until an alternative is found,' Tusk said in a Tweet, responding to a Johnson letter on Monday proposing that the European Union agrees to drop the backstop. 'Those against the backstop and not proposing realistic alternatives in fact support re-establishing a border. Even if they do not admit it.'
