Three former aides to President Donald Trump have volunteered to be questioned by lawmakers as part of a House probe of Russia's alleged meddling in the 2016 election.

Catherine Herridge reported this afternoon that Rep. Devin Nunes (R-CA), chairman of the House Intelligence Committee, has confirmed that former Trump campaign chair Paul Manafort offered lawmakers the opportunity to interview him.

Herridge said that Fox News has independently confirmed that former Trump advisers Carter Page and Roger Stone have also offered to cooperate with the House committee, as it investigates possible ties between the Trump team and Russia.

Stone made it clear in a series of recent tweets that he is ready and willing to testify:

Earlier this week, Shepard Smith spoke today to one of the two AP reporters who broke the story that Manafort secretly worked for a Russian billionaire to advance the interests of Vladimir Putin a decade ago.

Jeff Horwitz called Manafort a "gun for hire" who was willing to work on behalf of Putin and advance the Kremlin's interests.

Manafort denied there was anything nefarious about his work, calling the allegations about his ties to Putin a "smear campaign."

Watch Herridge's report above.

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