Trump ally Roger Stone says his testimony before the House Intelligence Committee probing possible ties between the Trump campaign and Russia has been delayed.

"Evidentially they can't handle the Stone Cold Truth," Stone wrote in an email.

Stone was previously scheduled to appear before the committee July 24. Any delay from the late July date may push the testimony to the other side of the House's August break.

Stone, an avid supporter of President Trump and informal adviser during the campaign, became a subject of the Russia probe after bragging about a "back channel" relationship with WikiLeaks head Julian Assange.

ADVERTISEMENT

The ally's private Twitter correspondence with Guccifer 2.0 – the online identity of the leaker of documents from the 2016 election hacking scandal – also surfaced online. U.S. intelligence agencies believe Guccifer 2.0 is a front for Russian intelligence.

A representative for Rep. Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (Calif.), the top Democrat on the intelligence committee, said that the panel "does not comment on, nor confirm or deny any witnesses or potential witnesses as part of its investigation."

Some believe Stone's Twitter feed shows evidence of coordination with WikiLeaks.

On Aug. 21, before emails from Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE's campaign chief John Podesta were leaked, Stone tweeted, “Trust me, it will soon [be] Podesta’s time in the barrel.#CrookedHillary.”

Stone told The Hill in October that the tweet was not referring to WikiLeaks. Instead, he said, that tweet was a response to Trump campaign chair Paul Manafort departing the campaign following scrutiny of his past lobbying work in Ukraine.

The potential delay comes after Stone jabbed Democrats on the panel during a radio interview this week.

Speaking on Buffalo, N.Y., station WBEN, Stone threatened to sue Rep. Jackie Speier (D-Calif.) for saying he was on the Kremlin payroll and called Rep. Eric Swalwell (D-Calif.) a "lightweight, mannequin, pretty-boy" and a "yellow-bellied coward."