There is a story that describes a means of cooking a frog, it goes:
"If a frog is placed in boiling water, it will jump out, but if it is placed in cold water that is slowly heated, it will not perceive the danger and will be cooked to death."
Similarly, the GOP hopes that their constituency will resign to nominating the establishment choice for the presidency if they can undermine Donald Trump. The GOP rigging of the Colorado Caucus was further proof of that. The question that remains is, will the frog find the urgency to jump?