Very easy! I am glad you are asking easy questions today!
Everybody and their uncle knows there are only 2 candidates running who oppose the GOPe. Every pollster worth his or her salt will testify in court that it is the insurgents Trump & Cruz against all the other entrenched GOPe candidates. Either one of them quits the race, the other one benefits.
Bear in mind thatthe GOP convention is a self-contained tribnal. It too can find Cruz unqualified.
There is a case to be made that Cruz was an intentional foil to get designated-loser Jeb the nomination.
You are using a liberal argument though.
Everybody and their uncle? Seriously? Theres a 97 percent consensus among scientists that global warming is caused by humans carbon dioxide emissions remember? We dont roll over and accept that kind of argument.
There are zero pollsters worth the salt in one of those fast food packages. Once again very speculative, hypothetical. How many polls got the 2012 election wrong? The only one to get it right was Nate Silver. Theres a reason we have elections and not do everything by telephone/internet polling.
The only poll that counts is the one on election/primary/caucus day.