Roger Stone, an ally of President Donald Trump and a longtime Republican operative, did not rule out on Sunday cooperating with special counsel Robert Mueller in his investigation of Russian meddling in the 2016 U.S. presidential election.
Arrested at his waterfront home in Florida on Friday in a dawn raid by FBI agents, Stone told reporters he would not "bear false witness against the president."
Stone was charged with lying to Congress about the Trump campaign's efforts to use stolen emails to undercut Democratic rival Hillary Clinton.