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Senate Intelligence Committee leaders are responding to former National Security Adviser Michael Flynn's refusal to hand over documents related to its Russia investigation by issuing subpoenas to two of his businesses.

Rather than comply with an earlier subpoena from the committee in its investigation into Russian meddling in the 2016 presidential election and possible collusion with the Trump campaign, Flynn on Monday invoked his Fifth Amendment right against self-incrimination. "While we disagree with Gen. Flynn's lawyers' interpretation of taking the Fifth ... it's even more clear that a business does not have a right to take the Fifth," Sen. Mark Warner (D-Va.), the panel's vice chairman, told reporters Tuesday.

Flynn, a foreign policy adviser to Trump during the campaign, was only national security adviser for a short amount of time, forced to resign just weeks after the inauguration when it came to light that he misled Vice President Mike Pence about his conversations with the Russian ambassador to the U.S.