Former CIA chief John Brennan revealed that a collusion between the Trump campaign and Russia was very possible. During his testimony before the House Intelligence Committee, Brennan said there was suspicious communication between Russian officials and Trump's associates. The CIA learned about their meetings when they launched an investigation into Russian hackers' involvement in the presidential race. “I know what the Russians try to do. They try to suborn individuals and try to get individuals, including U.S. individuals, to act on their behalf, wittingly or unwittingly," Brennan.