Donald Trump has questioned whether Joe Biden is physically able to run in the 2024 presidential election.
Donald Trump has launched an excoriating attack on Joe Biden
The former US president launched a scathing attack on his successor's mental and physical status and suggested that Biden "can't put two sentences together" and "can't walk".
In an interview with former Fox News host Tucker Carlson - on the same night that his Republican rivals took part in the first TV debate of the campaign - Trump said: "I don't think he gets to the starting gate, but these people do miracles.
"I think he's worse mentally than he is physically, and physically, he's not exactly a triathlete, or any kind of athlete.
"You look at him and he can't walk to the helicopter. He can't lift his feet out of the grass. It's only two inches at the White House (but) it looks like he's walking on toothpicks."
Trump also dramatically hinted that he could be assassinated by political opponents who are trying to stop him from returning to the White House.
He said in the interview: "Honestly, they're savage animals. They are people that are sick, really sick. You have got people in the Democrat Party, you have great people that are Democrats, most of the people in our country are fantastic.
"And I'm representing everybody. I'm not just Republicans. But I represent everybody - the president of everybody. But I've seen what they do. I've seen the lengths they go to."
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