"The First Amendment dictates that any inquiry by Congress should not begin by issuing requests to journalists for documents pertaining to its newsgathering," Pollack said in a statement published by WikiLeaks' Twitter account.
Assange has been targeted as part of a House Judiciary Committee probe investigating the Trump administration for potential obstruction of justice, corruption and other abuses of power.
Trump’s children Eric and Donald Jr., as well as son-in-law Jared Kushner are included in the list, as well as numerous former officials with a high profile in Special Counsel Robert Mueller’s probe of Russian meddling in the 2016 election. Russia has repeatedly denied meddling in the vote, dismissing the allegation as absurd.
Others on the list include former Trump lawyer Michael Cohen, former Trump campaign chair Paul Manafort, former National Security Adviser Michael Flynn and former campaign aide Roger Stone.