BARBARA ORTUTAY and DINO HAZELL
For the first time, Twitter has flagged some of President Donald Trump's tweets with a fact-check warning.
On Tuesday, Twitter added a warning phrase to two Trump tweets that called mail-in ballots "fraudulent" and predicted that "mail boxes will be robbed," among other things. Under the tweets, there is now a link reading "Get the facts about mail-in ballots" that guides users to a Twitter "moments" page with fact checks and news stories about Trump's unsubstantiated claims.
Until now, the president has simply blown past Twitter's half-hearted attempts to enforce rules intended to promote civility and "healthy" conversation on its most prominent user. Trump frequently amplifies misinformation, spreads abuse and uses his pulpit to perso