Top White House adviser, Ivanka Trump, sent hundreds of emails about government business from a personal email account, it has emerged.
The daughter of US President Donald Trump, sent emails to White House aides, cabinet members and her assistants from the account, which may have breached federal records rules, the Washington Post reported.
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The President criticised his 2016 rival, Hillary Clinton, for using a private email server during her time as secretary of state, branding her "crooked Hillary".
A spokesman for Ivanka Trump's lawyer said Ms Trump "almost always" used the private account for logistics and scheduling "concerning her family".
The discovery was prompted following a public records request from watchdog group, American Oversight.
'Not above the law'
US President Donald Trump and daughter Ivanka. Image: Getty
The group's executive director, Austin Evers, said in statement that the Presiden'ts family was "not above the law" and called for an investigation into the emails.
"For more than two years, President Trump and senior leaders in Congress have made it very clear that they view the use of personal email servers for government business to be a serious offence that demands investigation and even prosecution, and we expect the same standard will be applied in this case," he said.
An official from the Trump administration told CBS News that Ms Trump's emails did not contain any classified information, claiming it was a lack of understanding of the rules that led to Ms Trump using her private account.