Forget 2020. I cannot imagine him even being renominated for his Senate seat in 2018. Cruz is a lame duck senator.
All he had to do was say one sentence: "This November, I'm voting for Donald Trump."
I had friends emailing and texting me after Ted was booed off the stage. Something I've NEVER seen happen before at a GOP or Dem convention, btw. Cruz was "their guy", but they accepted the reality that Trump won, and is the nominee. They all told me how angry they were at him, and that he's dead to them now.
Cruz destroyed his career tonight on live TV. Stunning to watch.