CIA Director John Ratcliffe traveled to Moscow this week and warned Russia against any attack on NATO member states, U.S. media reported on Wednesday. The Wall Street Journal and CBS News reported that Ratcliffe aimed to dissuade Russia from attacking NATO members amid U.S. intelligence assessments that Moscow could seek to test the alliance. The Journal specified that Russian President Vladimir Putin could test NATO with a "limited assault" in the next few years. President Donald Trump called Ratcliffe's visit to Moscow on Tuesday "semi-routine," downplaying its significance. The White House did not respond to multiple requests for comment on the matter.