The organization posted a letter on its Twitter account dated Aug. 1 that purports to come from committee leaders Sens. Richard Burr (R-N.C.) and Mark Warner (D-Va.) requesting that he make himself available "for a closed door interview with bipartisan Committee staff at a mutually agreeable time and location."

A spokeswoman for Warner declined to comment on witnesses. A spokeswoman for Burr also declined to comment.

Assange's legal team is "considering the offer but testimony must conform to a high ethical standard," WikiLeaks wrote on Twitter.

Assange's testimony would be of interest to those investigating Russian interference in the 2016 election. 

WikiLeaks released troves of hacked emails from the Democratic National Committee (DNC) and Hillary Clinton's campaign chairman John Podesta ahead of the 2016 election. The U.S. intelligence community has tied the email releases to the broader plot by the Russian government to interfere in the election.