http://www.salon.com/2017/07/20/congressman-dana-rohrabacher-asked-nasa-scientists-if-aliens-occupied-mars-thousands-of-years-ago/ It doesn't bother me so much that he asked the question. However, his "can you rule that out?" question starts to sound like the "how can we know for sure, and if we can't know for sure it wasn't, it probably was" approach many UFOlogists take.
"Apparently, many of those who covered the exchange didn’t hear the wink in his voice."- Ken Grubb, Rohrabacher's spokesman.https://www.washingtonpost.com/news/speaking-of-science/wp/2017/07/19/nasa-wanted-to-talk-about-science-a-congressman-wanted-to-ask-about-martian-civilizations/?utm_term=.a7092bdf17bf