Ted Cruz knows how to present Conservative arguments effectively. He is in the tradition of Goldwater & Reagan in that. If he just can master Reagan's technique of shooting down Leftwing arguments with a smile--Goldwater, unfortunately, was more apt to scowl, which played into the hands of those who claimed he would start a nuclear war--although that was only one factor in his defeat.
That's before either Cruz or Jeb began a serious run at the nomination.
National Election Pool does all the national election day polling for every TV news network, also for Associated Press and New York Times.
I think it's fair to say the poll probably has some left wing bias, considering the news media who pay for it.
Still, I'll bet that Goldwater and Reagan never saw a poll like that - 50% “NO” - in their home states.