Intelligence chairman: We trust intelligence community conclusions that Russia meddled

(CNN) -- Senate intelligence committee chairman Richard Burr said Wednesday that the panel's investigation into Russian election interference has confirmed the findings of the intelligence community, though he said that portion of the investigation has not yet closed.

Burr said the panel's investigation into Russian election meddling has expanded since it began in January, and he hopes they will be able to have further conclusions soon.

Burr said the committee has interviewed every intelligence community official involved in drafting the report on Russian election meddling, as well as Obama administration official involved. He ticked off the amount of work the committee has done so far, including more than 100 interviews at over 250 hours, more than 4,000 transcript pages and 100,000 pages of documents reviewed.

Burr and the committee's top Democrat Mark Warner of Virginia are holding the news conference to provide a progress report on their months-long investigation that's probing both Russia meddling in the 2016 US election and whether there was collusion between members of Trump's team and the Russian government.

The committee has spoken behind closed doors to members of the intelligence community as well as Trump's inner circle, including former Trump campaign chairman Paul Manafort and Trump's son-in-law Jared Kushner.

There are several public hearings on the horizon. The first is for Trump's personal attorney, Michael Cohen, who had been scheduled for a private staff interview last month, but the committee postponed the appearance and invited him to a public session instead after Cohen provided a statement to the media denying any collusion with Russian officials.

The Senate intelligence panel has also invited Facebook, Twitter and Google to testify at a public hearing next month on Russia's use of social media in elections, which has become a major focus of the panel's probe in recent weeks.

Facebook on Monday provided Congress with copies of the 3,000 Russian-linked election ads it identified, as well as data including where the ads were targeted. CNN reported Tuesday that the ads targeted crucial swing states Wisconsin and Michigan.

The Senate intelligence committee is one of three congressional panels that are investigating Russian election meddling and possible collusion, in addition to Justice Department special counsel Robert Mueller's investigation.

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