The Senate Intelligence Committee interviewed former Trump campaign aide Michael Caputo behind closed doors Tuesday
Caputo worked for the Trump campaign from November 2015 to June 2016 as a political adviser.
Last summer, Caputo testified before the House Intelligence Committee in a closed-door session.
Speaking exclusively with ABC News upon his arrival Tuesday, Caputo once again disputed the notion the Trump campaign colluded with the Russians during the 2016 campaign.
“I’m looking forward to talking to the Senate committee," Caputo told ABC News. "I hope it’s the last time I’m asked to talk to anyone in Congress."
“There was no Russian collusion. We didn’t speak to Russians. We didn’t use Russian dressing. This is a witch hunt, a fishing expedition, and I can’t wait until it’s over,” Caputo added.
Caputo is connected to longtime Trump political advisor Roger Stone.
Caputo and Stone met in the mid-1980s when Caputo worked at Stone's lobbying firm Black, Manafort and Stone, as Stone's driver. Later, Caputo worked in the press shop of Trump's 1988 presidential campaign, spearheaded in part by Stone. The two joined forces again, working as aides in the nascent days of Trump's 2016 run.
In the 1990s, Caputo lived in Russia while working for an energy company with ties to current Russian President Vladimir Putin.
Former Trump campaign aide meets with Senate panel in Russia probe (ABC News)