The Rubio campaign is behind it.
http://www.bizpacreview.com/2016/03/25/secret-cruz-sex-scandal-talk-circulated-on-twitter-for-weeks-under-this-mysterious-hashtag-321324?utm_source=dlvr.it&utm_medium=twitter
"Run, Mickey ! RUN!"
#HickeyforMickey #IsTedAFurry