I suspect if Trump fall short you will have to examine your soul and tell us where your loyalties lie.
If you do the math, it's over. It's called addition, try it.
Once you can show us how Cruz and his close to 700 delegates ever gets the nomination, kindly demonstrate it.
If you are as smart as you suggest, perhaps you could start a movement to bring Cruz supporters back to reality. There is no longer a path for him to win. It's either Trump, or some nightmare from the GOPe.
You are now free to choose.