Former US president Donald Trump has made fresh disparaging remarks about his successor Joe Biden, branding him as "enemy of state".
Speaking at a Pennsylvania rally, Trump slammed Biden for undermining him and his supporters over what the Democratic US president had described as lawless "extremism".
Biden, in a speech in Philadelphia, a key battleground state ahead of November's decisive midterm elections, said the Republicans who supported Trump's Make America Great Again (MAGA) ideology represented “extremism that threatens the very foundation” of the United States.
"He's an enemy of the state. You want to know the truth. The enemy of the state is him," Trump told his supporters in Pennsylvania, during his first public appearance since the August 8 raid of his Mar-a-Lago resort in Palm Beach, Florida.
He also slammed the FBI raid, describing the search as a "travesty of justice" and warned it would produce "a backlash the likes of which nobody has ever seen."
"There can be no more vivid example of the very real threats from American freedom than just a few weeks ago, you saw, when we witnessed one of the most shocking abuses of power by any administration in American history," he claimed.
Trump, who is keeping supporters and commentators speculating about whether he intends to run for president again 2024, is under increasing legal pressure over the documents found by the FBI at his Mar-a-Lago residence.
He has filed a complaint to have the documents turned over to a neutral "special master," a move that could slow the government's investigation.
The Justice Department has said in court filings that highly classified government documents, including some marked "Top Secret," were found in Trump's personal office during the raid.
A detailed list of what was taken also showed Trump held on to more than 11,000 unclassified government records that he claims are his own to keep, but lawfully, are owned by the National Archives.
Among the documents found were 18 papers labeled "top secret", 53 labeled "secret" and another 31 marked "confidential." Of those, seven top secret dossiers, 17 secret files and three confidential papers were retrieved from Trump's private office.
Agents also found several dozen empty folders labeled "classified" in the office, raising speculation that sensitive papers might have been lost, destroyed or moved.