A Delaware prosecutor who worked in the office that is now prosecuting Hunter Biden sent messages to a secret email address that Hunter's father Joe had set up for himself, laptop records show.

Alexander Mackler, 40, is a Biden family friend and worked as a prosecutor in the Delaware US Attorney’s office from August 2016 through May 2019 – when the office’s probe into Hunter’s shady overseas dealings was already underway.

Congress is demanding records from the Biden administration on Joe’s use of personal email addresses to conduct government business, after communications on Hunter’s laptop show the president used at least four aliases, with fake names including ‘Robert L Peters’ and ‘Robin Ware’.

One of the emails shows Mackler wrote to Joe at the address robinware456@gmail.com.

Mackler, now Deputy Delaware Attorney General, worked as campaign manager for Joe’s late son Beau Biden in his successful 2010 bid for the state’s AG. In July 2015, a month after Beau’s death, Mackler wrote a heartfelt condolence email to the Biden family, including to one of Joe’s secret addresses.

Alexander Mackler knew that Joe Biden used the email address robinware456@gmail.com. He sent the then-Vice President condolences after the death of his older son Beau

The Biden family united in grief at Beau's funeral in June 2015 when Joe leaned in to kiss his widow Hallie – who would later become Hunter's lover. Mackler sent an email to several members of the family

Beau Biden, a captain in the Army Judge Advocate General's Corps, was also Delaware's Attorney General. His father visited him in Baghdad on July 4, 2009

Hunter named his young son after his brother Beau. They attended the July 4 firework display at the White House with Joe and First Lady Jill Biden

Prosecutor Alexander Mackler used Joe Biden's secret email address Robinware356@gmail.com in a note expressing his condolences at Beau's death which he also sent to other members of the Biden family

He addressed the July 7 2015 email to ‘the entire inimitable, expansive Biden clan,’ including Hunter, sister Ashley, Beau’s widow and later Hunter’s lover Hallie, Joe’s wife Jill, sister Valerie Owens, niece Missy and other family members – as well as one of Joe’s secret addresses.

‘Losing Beau has been particularly difficult because no one believed in me like he did,’ Mackler wrote. ‘Beau made me a better son, husband, brother, and now father. He set me free.’

He signed off the email: ‘See you, love you.’

The email shows Mackler’s deeply close connection with the Biden family, which has raised concerns about the impartiality of his former workplace, the Delaware US Attorney’s Office currently investigating Hunter for alleged tax felonies and potential foreign lobbying and money laundering crimes.

Republicans have attacked the office for offering a 'sweetheart deal' to Hunter. That deal fell through when a judge questioned it. The man in charge, David Weiss, has now been appointed a special prosecutor with powers to charge Hunter anywhere in the country.

One of the lead Delaware prosecutors in Hunter’s case, Leslie Wolf, worked closely with Mackler, even appearing as co-prosecutor in a criminal case in 2017 and 2018.

Mackler was one of a handful of prosecutors at the office when the case against Hunter was opened there in January 2019, a date provided by IRS whistleblowers in Congressional testimony about the probe of the president’s son.

He remained in the office through May that year. The Delaware office has declined to comment on what involvement, if any, he had in the Hunter investigation.

Last week Republican House Oversight Committee Chairman James Comer wrote to the National Archives and Records Administration (NARA) requesting unredacted copies of all Joe’s vice presidential communications using pseudonyms, including ‘Robert Peters, Robin Ware, and JRB Ware’.

One worrying May 2016 email referenced in Comer’s letter and previously reported by DailyMail.com shows White House staffers sent Joe’s schedule, including a call with then-Ukrainian president Petro Poroshenko, to Joe’s secret email ‘Robert L. Peters’.

Hunter sent a message to one of Joe's email addresses pressing the case forJohn McGrail to get a job in the Treasury's legal department

Staffer John Flynn used Biden's other address Robert.L.Peters@pci.gov to send a message about meeting then-Ukrainian president Petro Poroshenko. He also copied Hunter in on that email

Hunter also sent a message to the Robin Ware email pushing for John McGrail to get a job in the legal department of the Treasury

The staffer, John Flynn, also inexplicably copied Hunter, who was working for allegedly corrupt Ukrainian gas firm Burisma at the time, on the email.

White House staffers copied Hunter on a total of 10 emails to Joe’s alias addresses, records from his laptop show.

Joe and Hunter appeared to use the then-VP’s secret email to discuss government business in another incident in June 2014.

Hunter used his Rosemont Seneca consultancy email address to write to his father on June 23, 2014 about the employment of then-deputy White House counsel John McGrail.

‘Before you fill position pls talk to me — J. McGrail very much wants to serve as detail fr treasury,’ Hunter wrote.

‘Re Johnny call me right away Dad,’ Joe wrote back from the email robinware456@gmail.com.

McGrail was promoted to VP’s counsel the following year, then got his desired move to the Treasury as Senior Counsel in January 2017. He is currently Counselor to the Under Secretary for Domestic Finance at the department, according to his LinkedIn account.

Senators Chuck Grassley and Ron Johnson have been asking for unredacted records from NARA regarding Joe’s alias emails since 2021.

Republican Senators Ron Johnson and Chuck Grassley along with Rep. James Comer have been putting pressure on the National Archives to release Joe Biden's emails linked to addresses with pseudonyms

Anthony Blinken, then Biden's National Security Advisor also used the Robin Ware email to send a message to his boss about a talk Beau gave in Kyiv in 2012

Blinken wrote to Biden to say journalist Richard Ben Cramer had talked about Joe Biden's leadership right up to the moment of his death in 2013

In their letters they cited the Presidential Records Act which requires POTUS to provide copies of all communications involving government business, whether on personal email addresses or not, to the National Archives.

Comer has now also joined the push. In his August 17 letter to NARA, he pointed out that the emails challenge Joe’s previous claim that while VP he had ‘an absolute wall between the personal and private, and the government’.

‘Evidence reveals that access was wide open for his family’s influence peddling,’ Comer said in a statement last week.

‘We already have evidence of then-Vice President Biden speaking, dining, and having coffee with his son’s foreign business associates. We also know that Hunter Biden and his associates were informed of then-Vice President Biden’s official government duties in countries where they had a financial interest.

‘The National Archives must provide these unredacted records to further our investigation into the Biden family’s corruption.’

Other emails show Secretary of State Antony Blinken wrote to Joe using his alias addresses while acting as National Security Advisor to then-VP Joe.

Blinken forwarded a March 26 2012 email from Ukraine ambassador John Tefft to Joe’s ‘Robin Ware’ address, describing a speech given by Beau to Ukrainian members of parliament in Kyiv on the topic of corruption.