New York, Feb 11 : US President Joe Biden's re-election campaign managers launched a frontal attack on his predecessor Donald Trump's confused state of mind and slurring in his speech in retaliation to his appointee counsel Robert Hur alleging Biden suffered from memory loss, even about his son's death.

The Biden-Harris HQ account shared multiple clips from Trump's speech at the National Rifle Association (NRA) presidential forum in Harrisburg, Pennsylvania, on Friday showing him in a confused state of mind and slurring in his speech, media reports said.

The attacks were a retaliatory move against Trump-appointed Special Counsel Robert Hur's 388-page review of Biden following sensitive materials being found at the President's private residence in Delaware and former office at the Penn Biden Center in Washington, D.C., in December 2022 and January 2023.

Though Hur said Biden's lapses did not want criminal charges but cited concerns about the President's cognitive abilities; it was said that Biden's memory was significantly limited and that he struggled to remember basic and key facts.

Trump seized the opportunity taking off from Hur's report saying that the 81-year-old President's decline meant he was unfit to run for the second term as President.

Biden's team hit back raising similar concerns about Trump. In recent months, the 77-year-old has described Hungary's Prime Minister Viktor Orban as the leader of Turkey; referred to Nikki Haley as former House Speaker Nancy Pelosi; and also suggested that former President Barack Obama was still in office, media reports said.

Biden's campaign team appeared to highlight the apparent cognitive issues surrounding Trump, including slurring his words during his speech at the NRA convention. While sharing one clip, Biden's team said that a "confused" Trump says he got 100 per cent of the vote in the recent GOP primary in the Virgin Islands, which is "off by about 26 per cent".