WASHINGTON — The White House announced Thursday that Vladimir Putin has been invited to Washington this fall, even as leaders in Washington tried to fully understand what happened when President Donald Trump and the Russian leader met earlier this week in Helsinki.White House press secretary Sarah Huckabee Sanders announced the planned visit in a tweet, saying that national security adviser John Bolton extended the invitation and that “discussions are already underway.”As the late afternoon tweet landed, Director of National Intelligence Daniel Coats was on stage at the Aspen Security Forum in the middle of an interview with NBC’s Andrea Mitchell, who broke the news to him.