source?
For starters... there are plenty more.
http://www.theblaze.com/stories/2016/03/25/cruz-national-enquirer-sex-scandal-story-is-garbage-peddled-by-sleazy-donald/
http://www.usatoday.com/story/news/politics/onpolitics/2016/03/25/ted-cruz-blames-donald-trump-enquirer-affairs-story/82257996/