Democrats have vowed to launch a congressional investigation into how Ivanka Trump, the US president’s daughter, used a personal email account for government business.
The Washington Post reported that Mrs Trump used her personal account up to 100 times to contact other Trump administration officials last year.
Critics jumped on the similarities with Hillary Clinton’s use of a personal email server while secretary of state, which Donald Trump repeatedly attacked during his 2016 presidential campaign.
Mr Trump once dubbed the scandal over Mrs Clinton’s personal emails "bigger than Watergate” and his supporters still chant “lock her up” in rallies today, referencing the row.
Two prominent former White House figures who served under this president criticised Mrs Trump yesterday, suggesting the behaviour appeared hypocritical after her father’s vocal attacks on Mrs Clinton.
The use of the personal email account reportedly occurred in early 2017 as Ms Trump transitioned from an informal adviser to her father to a White House employee.
As well as up to 100 emails referencing government business, there were reportedly hundreds more which talked about scheduling clashes.
The emails could break the Presidential Records Act, which demand all official White House communications and records are kept as a permanent archive of each administration.
Elijah Cummings, a Democrat congressman who will become chairman of the House Oversight Committee in January, vowed to investigate the matter on Tuesday.
He called for relevant government documents to be handed over to determine if Mrs Trump and her husband, Jared Kushner, who is also a White House adviser, broke government records laws.
Peter Mirijanian, a spokesman for Mrs Trump’s attorney and ethics counsel Abbe Lowell, attempted to play down the similarities between Mrs Trump’s situation and that of Mrs Clinton, who lost the 2016 presidential election to Mr Trump.
Mr Mirijanian admitted in a statement to the Washington Post that “while transitioning into government” Mrs Trump “sometimes used her personal account” but insisted she had not been briefed on the rules.
He added: “Ms Trump did not create a private server in her house or office, no classified information was ever included, the account was never transferred at Trump Organization, and no emails were ever deleted.”
However two former White House officials who worked under Mr Trump – Marc Short, who was legislative affairs director, and Anthony Scaramucci, the former communications director – were critical.
Mr Short said on CNN: “It’s hypocritical, and, certainly, it looks bad. And I’m sure the media will have a field day with it today.”
Mr Scaramucci said: “Certainly, I think it’s hypocritical. I think even Ivanka, if she was interviewed about it, she’d have to say that it was a mistake. You can’t do that in that position.”
There are clear differences between the cases of Mrs Trump and Mrs Clinton, based on the limited information that has emerged about the former’s use of personal emails.
There is no suggestion that Mrs Trump created a personal server at home to house the emails, like Mrs Clinton did, or that she has deleted any emails.
Mrs Clinton’s email server was investigated by the FBI, who eventually chose not to bring charges.
However Democrats were quick to jump on the revelations, given the indignation Mr Trump voiced over Mrs Clinton’s email scandal during his successful bid for the White House and the tweets that he continues to send in office about the row.
The party’s indication that it will investigate the matter come January shows the significance of the Democrats winning back the majority in the House of Representatives at the midterm elections earlier this month.
Now the Democrats have control of the chamber – one half of the US Congress – they can use its committees to launch investigations into the Trump administration.