In the hands of anonymous internet users, A.I. tools can create waves of harassing and racist material. It’s already happening on the anonymous message board 4chan.
In dueling sets of speeches, Donald Trump and President Biden are framing the election as a battle for the future of democracy — with Mr. Trump brazenly casting Mr. Biden as the true menace.
Federal health officials and other experts have repeatedly sought to counter erroneous comments about the vaccines by Dr. Joseph Ladapo, Florida’s surgeon general.