Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Bridgewater (CNN) President Donald Trump said Friday that he was being sarcastic when he thanked Russian President Vladimir Putin on Thursday for expelling hundreds of American diplomats from the country. When asked if he meant his remarks about Putin sarcastically, Trump told reporters, "Absolutely. I think you know that I think you know that." Trump's remarks echo White House press secretary Sarah Huckabee Sanders' characterization of his comments. "He was being sarcastic," Sanders said earlier Friday. Trump's comments to reporters Friday came after a meeting with Secretary of State Rex Tillerson and Ambassador to the United Nations Nikki Haley in Bedminster, New Jersey. Tillerson told reporters Friday that the United States will have a response to Russia over the expelled diplomats by September 1."He was being sarcastic," Sanders saidThe remark instantly reverberated in Washington 
 Question:Though he has acknowledged _ was likely involved, he has also suggested it could have been other countries and rouge actors.

Russian