Well then it's certainly convenient you pulled that 20% figure out of thin air, as no one will ever know what, if any, impact Cruz's tweet about CNN's statement made.
Now, if Cruz had won by 30%, how much of Cruz's lead would you attribute CNN's error? [Hint: 30% of Carson's voters]
What actually happened was that 20% of Carson's voters went over to Trump, who would have lost convincingly to Rubio otherwise. Now see, I can make stuff up, too.
Serious question:
Why is the open borders group Club for Growth giving Cruz $705,000?