Michael Flynn: Trump press secretary accuses FBI of ‘manufacturing’ a crime against ex-national security Flynn Trump McEnany FBI Obama White House latest

Kayleigh McEnany makes accusations after Donald Trump said Barack Obama and Joe Biden are complicit in a scheme to take him down

Former national security adviser Michael Flynn has been cleared on all federal charges. GETTY (Getty)

The Obama-era FBI "existed to manufacture" a crime against his first national security adviser, Michael Flynn, a day after the Trump administration's Justice Department dropped all charges against the retired Army general.

"Did the FBI confront Flynn to get him to lie so we can prosecute him or get him fired," White House Press Secretary Kayleigh McEnany said Friday, paraphrasing internal FBI communications that were made public recently.

"If the FBI can target a three-star general," she said, "they can target you."

The Justice Department on Thursday dropped charges on Thursday, including one that Mr Flynn lied to federal investigators.

Mr Trump fired him in February 2017, saying he did so because his first national security adviser lied to Vice President Mike Pence and the FBI about his contacts with Russians and his private business dealings.

The president raged against the Flynn matter during a morning call-in interview with Fox News, during which he accused former President Barack Obama and his vice president, Joe Biden, the presumptive 2020 presidential nominee, of being complicit in a conspiracy to cook up a crime and put Mr Flynn behind bars while also ending his candidacy in 2016 or weakening his presidency.

"Sleepy Joe was involved in this, also," he said of the former vice president who is the presumptive Democratic presidential nominee. "Other people around president Obama were deeply involved, also," Mr Trump said, also implicated former President Barack Obama in what he agreed with a Fox host is the "greatest political scandal of all time."