Trump calls Joe Biden an "enemy of the state" over FBI raid saga

Former US president Donald Trump at his first rally since the FBI searched his Florida resort for sensitive files, 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.