He's ginning up interest. Thousands will watch, not to see Cruz, but to see him.
These town halls are his best forum, IMO.
Two dancers last night on Dancing with the Stars gave Trump publicity. His ex wife
https://www.youtube.com/watch?v=GKAR6v0tGuE
and Geraldo
https://www.youtube.com/watch?v=LaIUASa97_w
Note the Mexico sign