Trump fundraiser, former Fox News host and partner of Donald Trump Jr. Kimberley Guilfoyle launched a scathing attack on Joe Biden on the third day of the Republican National Convention in Milwaukee on Wednesday.

"Joe Biden cannot lead America. He cannot even lead himself off a stage. Now Americans are drowning in inflation. Insanity spreads like cancer in our schools. We are closer to World War III than any time in my life," she claimed.

Meanwhile, Texas governor Greg Abbott - who has repeatedly clashed with the Biden administration of border security - said it was 'time to restore order on the border'.

Richard Grenell, acting director of National Intelligence in the 2020 Trump administration claimed

"the world looked different when President Trump was in the White House."

"Putin did not dare escalate under President Trump. Under Trump, China was challenged. Under Trump, the Balkans were more peaceful. Under Trump, the Middle East signed historic peace deals. Under Trump, Iran was broke," he continued.

Media reports have repeatedly questioned Biden's health and cognitive abilities, with some within the Democratic Party urging him to step aside. On Wednesday, he tested positive for COVID-19, after telling one news outlet that he would consider dropping out "if a doctor diagnosed him with a 'medical condition'."

The RNC takes place from July 15-19 in Milwaukee, with Trump himself set to address the hall on Thursday.