Not entirely jOe. Most states, including TN have "Duty to Warn" laws
http://www.ncsl.org/research/health/mental-health-professionals-duty-to-warn.aspx

The problem of course is in interpretation of the threat. "I'd like to kill that b@@tch" is quite different than "I'm going to meet my x-wife after she gets off work Thursday and shoot her and her new boyfriend".

Cruz made numerous threats against both individuals and the school.

I guess we could ask Leonard Pitts who believes 4 out of 10 Republicans are "crazy"
http://www.miamiherald.com/opinion/opn-columns-blogs/leonard-pitts-jr/article201577229.html

https://sites.google.com/a/damascusknowledge.com/www/home