“I had a feeling there would be mixed reactions,” Ryan told the crowd.

http://news.yahoo.com/vp-candidate-ryan-heckled-booed-retiree-event-194856123.html

Also, from the same article, Democrats might have figured out how to explain the concept of social insurance they claim to be in favor of (yet seem to be eager to cut also):

“Given the conversations that have been out there in the political arena lately, I want to emphasize Medicare and Social Security are not handouts,” Obama said. “You’ve paid into these programs your whole life, you’ve earned them.”