A classified memo by congressional Democrats related to investigations of Russian influence in the 2016 U.S. presidential election is “very political and long” and must be “heavily redacted” before it could be released, President Donald Trump said on Twitter on Saturday, Reuters reported.

The release of the memo was blocked by Trump on Friday, kicking off a new skirmish between Democrats and the White House. Written by Democrats on the House Intelligence Committee, is was intended to rebut a Republican document made public last week with Trump’s consent.

The memo by committee Republicans claimed bias against Trump by the Federal Bureau of Investigation and Justice Department in the federal investigation of Russia and the 2016 U.S. election.

The Intelligence Committee had voted unanimously on Monday to release the document drafted by the panel’s Democrats, contingent on the Republican president agreeing.