Donald Trump's son-in-law and daughter are holding on to scores of real estate investments - part of a portfolio of at least $240 million in assets - while they serve in White House jobs, according to new financial disclosures.

The revelations about Jared Kushner and Ivanka Trump were part of a massive White House release of financial disclosure forms on Friday night for dozens of its top administration officials.

Mr Kushner, the president's senior adviser, resigned from some 260 entities and sold off 58 businesses or investments that lawyers identified as posing potential conflicts of interest, the documents show.

But lawyers for Mr Kushner and in the Office of the White House Counsel, in consultation with the Office of Government Ethics, determined that his real estate assets, many of them in New York City, are unlikely to pose the kinds of conflicts that would trigger a need to divest.

"The remaining conflicts, from a practical perspective, are pretty narrow and very manageable," said Jamie Gorelick, an attorney who has been working on the ethics agreements for Kushner and Ivanka Trump.