ABC News reported that subpoenas issued in recent weeks have asked recipients about the PAC’s formation, its fundraising activities and its spending.

Mr Trump is now the subject of numerous ongoing federal and state investigations, including several probing his role in the January 6 2021 attack on the US Capitol building, his efforts to overturn the results of the 2020 election, and how thousands of government records – including documents with highly classified markings – ended up at his private Mar-a-Lago club.

The former president aggressively fundraised following the 2020 election, capitalising on his supporters’ anger about his defeat by Joe Biden and their refusal to accept it.

Former US President Donald Trump is now facing a number of investigations

During its hearings, the US house committee investigating the January 6 attack said Mr Trump’s fundraising machine had collected some 250 million dollars (£217 million) from his campaigns to “Stop the Steal” and others in the aftermath of the election, mostly in small-dollar donations from Americans.

One plea for cash went out 30 minutes before the January 6 insurrection which saw disgraceful and violent scenes at the Capitol as supporters of the ousted President attempted to storm the building.

Earlier, Mr Trump had insisted that he was robbed of the White House role and the election had been rigged, returning a ‘fake’ result.

“Not only was there the big lie, there was the big rip-off,” representative Zoe Lofgren said of these efforts.

No credible evidence has emerged to support Mr Trump’s claims that the election was marred by mass fraud.

Numerous state and local elections officials, including Mr Trump’s own attorney general and judges he appointed, have also rejected such claims.

Mr Trump’s PAC – which he has used to pay for his post-presidential rallies, other travel, legal bills and even the portraits of him and the former first lady that will one day hang in the Smithsonian’s National Portrait Gallery – has raised millions since its creation.

It ended in July with just under 100 million dollars (£87 million) cash-on-hand, according to US government filings.

Following the highly-publicised raid on Mr Trump’s Palm Beach home, Mar-a-Lago, security experts have claimed that he stored nuclear secrets among a trove of highly classified documents for 18 months, making it a magnet for foreign spies.

It has been reported that a document describing an un-named foreign government’s defences, including its nuclear capabilities, was one of the many highly secret papers he removed from the White House when he left office in January 2021.

There were also documents marked SAP, for Special-Access Programmes, which are mainly about US intelligence operations and whose circulation is severely restricted, even among administration officials with the highest level of security clearance.

There were also papers stamped HCS, Humint Control Systems, involving human intelligence gathered from agents in enemy countries.

The Office of the Director of National Intelligence is conducting a damage assessment review, but US officials said it is the job of FBI counter-intelligence to assess who may have gained access to them.

One security lapse saw a Russian-speaking immigrant from Ukraine mingle with the former president’s family and friends at Mar-a-Lago, posing as a banking dynasty heiress.

Donald Trump: probe into ex-US President turns focus to 'Save America' leadership