A Republican-drafted memo alleging FBI bias against US President Donald Trump will be released on Friday, a senior White House official says.
Mr Trump is expected to declassify the document and send it to Congress for release, according to US media.
The FBI has voiced “grave concerns” about the release of the memo, which is expected to have redactions.
It reportedly says the FBI misled an intelligence court to obtain a warrant to spy on the Trump election campaign.
Democrats say the memo is a ruse to discredit a federal inquiry into links between President Trump’s presidential campaign and Russia.
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The four-page document was compiled by aides for House Intelligence Committee chairman Devin Nunes, a member of Mr Trump’s Republican party.
