By Madeline Halpert
BBC News, New York
Former President Donald Trump's son-in-law Jared Kushner has appeared before a federal grand jury investigating Mr Trump's efforts to overturn the 2020 election, US media report.
A justice department special counsel is investigating Mr Trump's actions leading up to the 2021 Capitol riots.
The grand jury asked if Mr Trump acknowledged at the time he lost the election, the New York Times reported.
Mr Trump's former aide Hope Hicks also testified, according to CNN.
The BBC has reached out to representatives for Mr Trump and Mr Kushner for comment.
Federal prosecutors investigating Mr Trump's 2020 election conduct are deciding whether to bring charges against him.
Last month, Mr Kushner appeared before the grand jury at a federal courthouse in Washington DC, where he told them he thought his father-in-law truly believed the election was rigged, anonymous sources told the New York Times.
Ms Hicks and Mr Kushner are reportedly among several Trump allies who have testified to the grand jury, including former Vice-President Mike Pence.
Mr Smith's team has also subpoenaed Mr Trump's daughter, Ivanka Trump, who is married to Mr Kushner, but she has yet to testify, the New York Times reported.
US Attorney General Merrick Garland last year appointed special counsel Jack Smith to lead two investigations into Mr Trump: his handling of classified documents at his Mar-a-Lago estate and his attempts to overturn the 2020 election won by President Joe...
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