(CNN) After being interviewed by special counsel investigators on Wednesday, former aide to Donald Trump's presidential campaign Michael Caputo told CNN that Robert Mueller's team is "focused on Russia collusion."

"It's clear they are still really focused on Russia collusion," Caputo said, adding, "They know more about the Trump campaign than anyone who ever worked there."

Caputo, who advised the Trump campaign on communications in 2016, has long insisted he has no information about collusion between Trump's team and Russia. He spoke with Senate intelligence investigators on Tuesday for their Russia probe and outlined the differences between Congress' inquiries and the special counsel's.

"The Senate and the House are net fishing," Caputo said. "The special counsel is spearfishing. They know what they are aiming at and are deadly accurate."

Caputo lived and worked in Russia in the 1990s and later did business with Russian companies, including Gazprom, the Kremlin-controlled energy giant. As a Republican consultant, Caputo worked with Trump adviser Roger Stone and Paul Manafort, the former campaign chairman. He denies any wrongdoing regarding Russia. Caputo is a longtime ally of Stone's, a close associate of Trump who has come under scrutiny in the Russian investigation because of Stone's contacts with WikiLeaks during the campaign.

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