Biden Is Out of the Race. Trump Is Still Attacking Him.

Shortly after President Biden announced he was ending his re-election campaign, former President Donald J. Trump on Sunday afternoon posted on social media a forceful attack denouncing him. Over the next hours, he posted several more.

On Monday he woke up and started fresh. “It’s a new day and Joe Biden doesn’t remember quitting the race yesterday!” Mr. Trump wrote on his social media site, Truth Social.

Even with Mr. Biden out of the race and supporting Vice President Kamala Harris, who has racked up a string of endorsements from Democrats and is the early favorite to become the party’s nominee, Mr. Trump has continued his stream of attacks on Mr. Biden, turning to a familiar method of communication and release valve: social media.

The torrent of criticism, in which he called Mr. Biden “incompetent,” forgetful and anti-democratic, followed a pattern that Mr. Trump, the Republican presidential nominee, set in the White House. In lieu of a news conference or televised statements, Mr. Trump would often post on his preferred platform — then Twitter, now Truth Social.

In his posts since Mr. Biden’s announcement, Mr. Trump has so far not taken direct aim at Ms. Harris or other popular Democrats who have at various points been mentioned as possible options for the ticket.

Instead, Mr. Trump has fallen back on attacks on Mr. Biden that largely echoed the ones he has been making for years. Mr. Biden, he wrote, was unfit to serve as commander in chief and was “the Worst President in the history of the United States.”