'A Twitter spokesman said Mr. Trump's tweets about mail-in ballots "contain potentially misleading information about voting processes and have been labeled to provide additional context."'
That is called "editorializing", and it distinguishes a publisher from a platform. Wanna "provide additional context"? Well you better start doing it for every single user contributing to your publication, but maybe do that after you bulk up on corporate lawyers - because your curated content firehose is going to attract the litigious type.