Tulsi Gabbard, the director of national intelligence, released a document on Wednesday that she said undermined the conclusion of intelligence agencies during the Obama administration that Russia favored the election of Donald J. Trump in 2016.

The document was a report that the House Intelligence Committee originally drafted in 2017, when Republicans led the panel. The report took issue with the conclusion reached in December 2016 that President Vladimir V. Putin of Russia had favored Mr. Trump.

The new material provides some interesting insights into the development of the review of Russian activity by American spy agencies, and the debate over their assessment. But none of the new information changes the fundamental view that Russia meddled in the election and that Mr. Putin hoped to damage Hillary Clinton, the Democratic nominee.

On Sunday, Ms. Gabbard promised to refer the details of her findings to the Justice Department. And on Wednesday, she said in a social media post that Mr. Trump had ordered the declassification of the report and that the information showed the “most egregious weaponization and politicization of intelligence in American history.”

The Obama administration, Ms. Gabbard wrote, was “promoting the LIE that Vladimir Putin and the Russian government helped President Trump win the 2016 election.”

Ms. Gabbard has won praise from Mr. Trump for her investigation into the intelligence findings and spoke at length about how the 2016 assessment was part of a witch hunt against him. The president has been under sharp criticism for his handling of documents related to the disgraced financier Jeffrey Epstein, and his attacks on the Obama administration appear to be part of a distract-and-deflect strategy.