Trump pivots attacks toward Harris as Secret Service director testifies about assassination attempt: Live updates

Donald Trump has slammed Joe Biden after the president announced he will drop out of the 2024 race for the White House on Sunday and already pivoted to criticising Vice President Kamala Harris in his latest attack ad after Biden nominated her as his successor.

The storm around the president had been brewing ever since his disastrous performance at the first presidential debate in Atlanta a month ago, which sent his party into panic mode and prompted a wave of Democratic lawmakers, strategists, donors and pundits to call on the 81-year-old to bow out and make way for a younger nominee.

Now that he has done, the Republican presidential contender wrote in a post on Truth Social that Biden “was not fit to run for president, and is certainly not fit to serve.”

He added: “We will suffer greatly because of his presidency, but we will remedy the damage he has done very quickly.”

Trump’s running mate JD Vance called on Biden to resign from the White House too.

Meanwhile, Secret Service director Kimberly Cheatle is appearing before the House Oversight Committee to answer questions about the security failings that led to Trump’s shooting in Butler, Pennsylvania , nine days ago.