Eric Trump has said that Joe Biden won't be the Democrat nominee for the 2024 election.
Speaking to Nigel Farage on GBNews America, the son of Donald Trump said: "Biden is a very weak president. Clearly not physically up to the job or mentally up to the job.
"Do you think he would still be the candidate come November? I don't, you know, if you can't walk up the stairs to Air Force One if you can't walk across the room if you can't get off the stage.
"I don't mean to disparage because that's not my style. But that's a rigorous job I saw my father go through it every single day.
Eric Trump claimed that Biden "doesn't have the stamina"
GBNews
"It's the toughest job in the world. I mean these are real decisions every second of every single day. Real leadership.
"I just don't think he has a stamina. My father was a great cheerleader for the United States of America. We're the best country.
"We should be saying we've got the best economy we can manufacture better than anybody. We've got the greatest military.
"We've got the greatest economy. We've got the greatest cities. Come invest in America, come build in America. We can build your products. We're not going to let other countries rip us off.
Joe Biden is the favourite to win the Democratic nominationREUTERS"We don't have a cheerleader under this president. And that's sad because it creates a global void.
"America is the epitome of power and might and keeps so many seams together and all of a sudden you start seeing weakness coming from one person and those fissures start to crack.
"And you see instances like what we're seeing in Israel.
"What the sad thing about the Israel conflict is? If that happened under Donald Trump, he would have been thrown out of office.
"Meaning if our intelligence agencies missed thousands and thousands of people assembling thousands of rockets and taking over outpost camps in Israel and coming across the border and gliders.
Donald Trump is leading the race for the Republican nominationREUTERSBiden is widely expected to come up against Trump in the November election in what would be a rematch of the 2020 election.
Trump romped to victory in the Iowa caucus with over half of the vote as he took his first step towards securing the Republican nomination.
The US President has lashed out at suggestions he is no longer capable of performing the job to his best ability despite being the oldest-ever incumbent.
Trump is facing former South Carolina Governor Nikki Haley in New Hampshire before voters go to the polls on Tuesday.