Yes, but anyone can make a comment aimed at the opponent, and if it is a strong one, the opponent will look weak if they fail to address it. All Cruz has to say during a debate is "Over the last six-and-a-half years, the rich have gotten richer and hard-working men and women across America have seen their lives get harder and harder. The people who have been hurt the most are the most vulnerable. Young people, Hispanics, African-Americans, single moms. This is the direct result of the policies that my esteemed opponent is espousing and promising."
If Hillary (or any opponent) does not counter that punch, they're toast.
Cruz will destroy any rAt in a debate. As the field shrinks in the primary race he will distinguish himself in the debates.
He will be the next president.