I don't know WHAT you're reading, but Cruz can't draw blacks, has far FEWER Hispanics on his side than Trump has, doesn't attract the young, the blue collar workers,the disaffected Dems,the secular folks, nor even many main stream Protestants.
And FYI...the polls with various different GOP candidates V. Hillary ( who may NOT even be the Dem nominee! )are garbage.
In a debate between Hillary and Cruz, Cruz would lose and lose badly!