Retiring President Biden stunned listeners Tuesday by saying his predecessor Donald Trump should be locked up  14 days before the presidential election in which Trump is the Republican nominee.

If I said this five years ago, youd lock me up: We gotta lock him up, Biden, 81, said during a visit to a Democratic campaign office in Concord, NH, the Granite States capital.

After a four-second pause during which his audience enthusiastically applauded, Biden added in an apparent backtrack attempt: politically, lock him up  lock him out, thats what weve got to do.

Biden called for Trump to be jailed during an appearance on Tuesday.REUTERS

If I said this 5 years ago, youd lock me up: we gotta lock him up, Biden, 81, saidREUTERS

The Trump campaign quickly hit back, accusing Biden of making a Freudian slip.

Joe Biden just admitted the truth: he and Kamalas plan all along has been to politically persecute their opponent President Trump because they cant beat him fair and square, Trump campaign spokeswoman Karoline Leavitt said in a statement.

The Harris-Biden Admin is the real threat to democracy. We call on Kamala Harris to condemn Joe Bidens disgraceful remark.

A person close to Biden, who often misspeaks in public, told The Post that the presidents follow-up comment meant that he hadnt intended to call for Trump to be incarcerated.

However, the president and his aides typically refrain from commenting at all on the four pending criminal cases against Trump, who contends that a quartet of local and federal indictments last year were politically motivated to aid Bidens then-re-election campaign.

Biden has tauntingly referenced Trumps legal woes before, however, saying last week that I think hes running to stay out of jail during an appearance in Pennsylvania.

Trump, 78, was convicted in May by a Manhattan jury of 34 criminal counts of falsifying business records to conceal hush money payments to adult film star Stormy Daniels in the final weeks of the 2016 campaign.

Trump faces pending federal and state charges in Georgia related to challenging his 2020 election defeat by Biden. And federal prosecutors are attempting to revive another case accusing Trump of mishandling classified records, which a judge dismissed in July.REUTERS

The 45th presidents sentencing in that case, which was brought by Manhattan District Attorney Alvin Bragg, an elected Democrat, is scheduled for Nov. 26.

Trump also faces pending federal and state charges in Georgia related to challenging his 2020 election defeat by Biden. And federal prosecutors are attempting to revive another case out of South Florida accusing Trump of mishandling classified records, which a judge dismissed in July.

If Trump becomes the 47th president on Nov. 5, the new administrations Justice Department leaders likely would seek to set aside the two federal cases.

Trump, 78, was convicted in May by a Manhattan jury of 34 criminal counts of falsifying business records to conceal 2016 hush money payments.AP

Trump and Vice President Kamala Harris, the Democratic nominee, are in a close contest according to swing-state polling  with RealClearPolitics averages showing Trump marginally ahead across the board, but within survey margins of error.

Harris, 60, usually treads carefully when discussing whether Trump should be jailed  often telling supporters who chant lock him up! at her rallies that the court system will make that decision.